Update documentation
diff --git a/docs/dyn/runtimeconfig_v1beta1.projects.configs.variables.html b/docs/dyn/runtimeconfig_v1beta1.projects.configs.variables.html
index de2490b..eef113c 100644
--- a/docs/dyn/runtimeconfig_v1beta1.projects.configs.variables.html
+++ b/docs/dyn/runtimeconfig_v1beta1.projects.configs.variables.html
@@ -76,16 +76,16 @@
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#create">create(parent=None, body, x__xgafv=None)</a></code></p>
-<p class="firstline">Creates a variable within the given configuration.</p>
+<p class="firstline">Creates a variable within the given configuration. You cannot create</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(name, recursive=None, x__xgafv=None)</a></code></p>
-<p class="firstline">Deletes variable or variables.</p>
+  <code><a href="#delete">delete(name=None, recursive=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes a variable or multiple variables.</p>
 <p class="toc_element">
-  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
-<p class="firstline">Gets the variable resource object.</p>
+  <code><a href="#get">get(name=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets information about a single variable.</p>
 <p class="toc_element">
-  <code><a href="#list">list(parent, pageSize=None, filter=None, pageToken=None, x__xgafv=None)</a></code></p>
-<p class="firstline">Lists variables within given RuntimeConfig object, matching optionally</p>
+  <code><a href="#list">list(parent=None, pageSize=None, filter=None, pageToken=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists variables within given a configuration, matching any provided filters.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
@@ -93,48 +93,59 @@
   <code><a href="#update">update(name=None, body, x__xgafv=None)</a></code></p>
 <p class="firstline">Updates an existing variable with a new value.</p>
 <p class="toc_element">
-  <code><a href="#watch">watch(name, body, x__xgafv=None)</a></code></p>
-<p class="firstline">WatchVariable watches for a variable to change and then returns the new</p>
+  <code><a href="#watch">watch(name=None, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Watches a specific variable and waits for a change in the variable's value.</p>
 <h3>Method Details</h3>
 <div class="method">
     <code class="details" id="create">create(parent=None, body, x__xgafv=None)</code>
-  <pre>Creates a variable within the given configuration.
-Create variable will create all required intermediate path elements.
-It is a FAILED_PRECONDITION error to create a variable with a name that is
-a prefix of an existing variable name, or that has an existing variable
-name as a prefix.
+  <pre>Creates a variable within the given configuration. You cannot create
+a variable with a name that is a prefix of an existing variable name, or a
+name that has an existing variable name as a prefix.
+
+To learn more about creating a variable, read the
+[Setting and Getting Data](/deployment-manager/runtime-configurator/set-and-get-variables)
+documentation.
 
 Args:
-  parent: string, The configuration parent, that will own the variable.
-Required, must a valid configuration name within project_id. (required)
+  parent: string, The path to the RutimeConfig resource that this variable should belong to.
+The configuration must exist beforehand; the path must by in the format:
+
+`projects/[PROJECT_ID]/configs/[CONFIG_NAME]` (required)
   body: object, The request body. (required)
     The object takes the form of:
 
-{ # Variable message describes a single variable within a Configuration object.
-    # name denotes the hierarchical variable name, e.g.
-    # ports/serving_port within flags configuration object.
-    # Value is an opaque string and only leaf variables can have values.
+{ # Describes a single variable within a RuntimeConfig resource.
+    # The name denotes the hierarchical variable name. For example,
+    # `ports/serving_port` is a valid variable name. The variable value is an
+    # opaque string and only leaf variables can have values (that is, variables
+    # that do not have any child variables).
+  "text": "A String", # The textual value of the variable. The length of the value must be less
+      # than 4096 bytes. Empty values are also accepted.
+      # NB: Only one of value and string_value can be set at the same time.
   "updateTime": "A String", # [Output Only] The time of the last variable update.
-  "state": "A String", # [Ouput only] The current state of the variable.
-      # State denotes the outcome of the Watch call and is unset by the Get/List
-      # calls.
-  "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-      # value must be Base64 encoded.
-  "name": "A String", # Name of the variable resource.
-      # It has format of
-      # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-      # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-      # must be a valid RuntimeConfig object and `variable_id` follows Unix
-      # file system file path naming.
-      # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-      # Slashes are used as path element separators and are not part of the
-      # `variable_id` itself, so `variable_id` must contain at least one non-slash
-      # character. Multiple slashes are coalesced into single slash character.
-      # Each path segment should follow RFC 1035 segment specification.
-      # `len(variable_id)` must be less than 256 bytes.
-      # The name is assigned by the client, but will be validated on the server
-      # side to adhere to the format.
-      # Name is immutable and cannot be changed.
+  "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+      # the outcome of the `variables().watch` call and is visible through the
+      # `get` and `list` calls.
+  "value": "A String", # The binary value of the variable. The length of the value must be less
+      # than 4096 bytes. Empty values are also accepted. The value must be
+      # Base64 encoded.
+      # NB: Only one of value and string_value can be set at the same time.
+  "name": "A String", # The name of the variable resource, in the format:
+      # 
+      #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+      # 
+      # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+      # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+      # file path naming.
+      # 
+      # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+      # dashes. Slashes are used as path element separators and are not part of the
+      # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+      # non-slash character. Multiple slashes are coalesced into single slash
+      # character. Each path segment should follow RFC 1035 segment specification.
+      # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+      # 
+      # Once you create a variable, you cannot change the variable name.
 }
 
   x__xgafv: string, V1 error format.
@@ -145,45 +156,56 @@
 Returns:
   An object of the form:
 
-    { # Variable message describes a single variable within a Configuration object.
-      # name denotes the hierarchical variable name, e.g.
-      # ports/serving_port within flags configuration object.
-      # Value is an opaque string and only leaf variables can have values.
+    { # Describes a single variable within a RuntimeConfig resource.
+      # The name denotes the hierarchical variable name. For example,
+      # `ports/serving_port` is a valid variable name. The variable value is an
+      # opaque string and only leaf variables can have values (that is, variables
+      # that do not have any child variables).
+    "text": "A String", # The textual value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted.
+        # NB: Only one of value and string_value can be set at the same time.
     "updateTime": "A String", # [Output Only] The time of the last variable update.
-    "state": "A String", # [Ouput only] The current state of the variable.
-        # State denotes the outcome of the Watch call and is unset by the Get/List
-        # calls.
-    "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-        # value must be Base64 encoded.
-    "name": "A String", # Name of the variable resource.
-        # It has format of
-        # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-        # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-        # must be a valid RuntimeConfig object and `variable_id` follows Unix
-        # file system file path naming.
-        # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-        # Slashes are used as path element separators and are not part of the
-        # `variable_id` itself, so `variable_id` must contain at least one non-slash
-        # character. Multiple slashes are coalesced into single slash character.
-        # Each path segment should follow RFC 1035 segment specification.
-        # `len(variable_id)` must be less than 256 bytes.
-        # The name is assigned by the client, but will be validated on the server
-        # side to adhere to the format.
-        # Name is immutable and cannot be changed.
+    "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+        # the outcome of the `variables().watch` call and is visible through the
+        # `get` and `list` calls.
+    "value": "A String", # The binary value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted. The value must be
+        # Base64 encoded.
+        # NB: Only one of value and string_value can be set at the same time.
+    "name": "A String", # The name of the variable resource, in the format:
+        #
+        #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+        #
+        # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+        # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+        # file path naming.
+        #
+        # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+        # dashes. Slashes are used as path element separators and are not part of the
+        # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+        # non-slash character. Multiple slashes are coalesced into single slash
+        # character. Each path segment should follow RFC 1035 segment specification.
+        # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+        #
+        # Once you create a variable, you cannot change the variable name.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(name, recursive=None, x__xgafv=None)</code>
-  <pre>Deletes variable or variables.
-If name denotes a variable, that variable is deleted. If name is a prefix
-and recursive is true, then all variables with that prefix are deleted,
-it's a FAILED_PRECONDITION to delete a prefix without recursive being true.
+    <code class="details" id="delete">delete(name=None, recursive=None, x__xgafv=None)</code>
+  <pre>Deletes a variable or multiple variables.
+
+If you specify a variable name, then that variable is deleted. If you
+specify a prefix and `recursive` is true, then all variables with that
+prefix are deleted. You must set a `recursive` to true if you delete
+variables by prefix.
 
 Args:
-  name: string, The name of the variable to delete. (required)
-  recursive: boolean, If recursive is false and name is a prefix of other variables, then
-the request will fail.
+  name: string, The name of the variable to delete, in the format:
+
+`projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]` (required)
+  recursive: boolean, Set to `true` to recursively delete multiple variables with the same
+prefix.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -205,11 +227,13 @@
 </div>
 
 <div class="method">
-    <code class="details" id="get">get(name, x__xgafv=None)</code>
-  <pre>Gets the variable resource object.
+    <code class="details" id="get">get(name=None, x__xgafv=None)</code>
+  <pre>Gets information about a single variable.
 
 Args:
-  name: string, What variable to return. (required)
+  name: string, The name of the variable to return, in the format:
+
+`projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIBLE_NAME]` (required)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -218,47 +242,58 @@
 Returns:
   An object of the form:
 
-    { # Variable message describes a single variable within a Configuration object.
-      # name denotes the hierarchical variable name, e.g.
-      # ports/serving_port within flags configuration object.
-      # Value is an opaque string and only leaf variables can have values.
+    { # Describes a single variable within a RuntimeConfig resource.
+      # The name denotes the hierarchical variable name. For example,
+      # `ports/serving_port` is a valid variable name. The variable value is an
+      # opaque string and only leaf variables can have values (that is, variables
+      # that do not have any child variables).
+    "text": "A String", # The textual value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted.
+        # NB: Only one of value and string_value can be set at the same time.
     "updateTime": "A String", # [Output Only] The time of the last variable update.
-    "state": "A String", # [Ouput only] The current state of the variable.
-        # State denotes the outcome of the Watch call and is unset by the Get/List
-        # calls.
-    "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-        # value must be Base64 encoded.
-    "name": "A String", # Name of the variable resource.
-        # It has format of
-        # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-        # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-        # must be a valid RuntimeConfig object and `variable_id` follows Unix
-        # file system file path naming.
-        # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-        # Slashes are used as path element separators and are not part of the
-        # `variable_id` itself, so `variable_id` must contain at least one non-slash
-        # character. Multiple slashes are coalesced into single slash character.
-        # Each path segment should follow RFC 1035 segment specification.
-        # `len(variable_id)` must be less than 256 bytes.
-        # The name is assigned by the client, but will be validated on the server
-        # side to adhere to the format.
-        # Name is immutable and cannot be changed.
+    "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+        # the outcome of the `variables().watch` call and is visible through the
+        # `get` and `list` calls.
+    "value": "A String", # The binary value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted. The value must be
+        # Base64 encoded.
+        # NB: Only one of value and string_value can be set at the same time.
+    "name": "A String", # The name of the variable resource, in the format:
+        #
+        #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+        #
+        # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+        # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+        # file path naming.
+        #
+        # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+        # dashes. Slashes are used as path element separators and are not part of the
+        # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+        # non-slash character. Multiple slashes are coalesced into single slash
+        # character. Each path segment should follow RFC 1035 segment specification.
+        # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+        #
+        # Once you create a variable, you cannot change the variable name.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent, pageSize=None, filter=None, pageToken=None, x__xgafv=None)</code>
-  <pre>Lists variables within given RuntimeConfig object, matching optionally
-provided filter.
-List contains only variable metadata, but not values.
+    <code class="details" id="list">list(parent=None, pageSize=None, filter=None, pageToken=None, x__xgafv=None)</code>
+  <pre>Lists variables within given a configuration, matching any provided filters.
+This only lists variable names, not the values.
 
 Args:
-  parent: string, Which RuntimeConfig object to list for variables. (required)
-  pageSize: integer, List pagination support.
-The size of the page to return. We may return fewer elements.
-  filter: string, List only variables matching filter prefix exactly.
-e.g. `projects/{project_id}/config/{config_id}/variables/{variable/id}`.
-  pageToken: string, The token for pagination.
+  parent: string, The path to the RuntimeConfig resource for which you want to list variables.
+The configuration must exist beforehand; the path must by in the format:
+
+`projects/[PROJECT_ID]/configs/[CONFIG_NAME]` (required)
+  pageSize: integer, Specifies the number of results to return per page. If there are fewer
+elements than the specified number, returns all elements.
+  filter: string, Filters variables by matching the specified filter. For example:
+
+`projects/example-project/config/[CONFIG_NAME]/variables/example-variable`.
+  pageToken: string, Specifies a page token to use. Set `pageToken` to a `nextPageToken`
+returned by a previous list request to get the next page of results.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -268,34 +303,45 @@
   An object of the form:
 
     { # Response for the `ListVariables()` method.
-      # Order of returned variable objects is arbitrary.
-    "nextPageToken": "A String", # Pagination support.
-    "variables": [ # Matched variables and their values.
-      { # Variable message describes a single variable within a Configuration object.
-          # name denotes the hierarchical variable name, e.g.
-          # ports/serving_port within flags configuration object.
-          # Value is an opaque string and only leaf variables can have values.
+    "nextPageToken": "A String", # This token allows you to get the next page of results for list requests.
+        # If the number of results is larger than `pageSize`, use the `nextPageToken`
+        # as a value for the query parameter `pageToken` in the next list request.
+        # Subsequent list requests will have their own `nextPageToken` to continue
+        # paging through the results
+    "variables": [ # A list of variables and their values. The order of returned variable
+        # objects is arbitrary.
+      { # Describes a single variable within a RuntimeConfig resource.
+          # The name denotes the hierarchical variable name. For example,
+          # `ports/serving_port` is a valid variable name. The variable value is an
+          # opaque string and only leaf variables can have values (that is, variables
+          # that do not have any child variables).
+        "text": "A String", # The textual value of the variable. The length of the value must be less
+            # than 4096 bytes. Empty values are also accepted.
+            # NB: Only one of value and string_value can be set at the same time.
         "updateTime": "A String", # [Output Only] The time of the last variable update.
-        "state": "A String", # [Ouput only] The current state of the variable.
-            # State denotes the outcome of the Watch call and is unset by the Get/List
-            # calls.
-        "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-            # value must be Base64 encoded.
-        "name": "A String", # Name of the variable resource.
-            # It has format of
-            # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-            # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-            # must be a valid RuntimeConfig object and `variable_id` follows Unix
-            # file system file path naming.
-            # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-            # Slashes are used as path element separators and are not part of the
-            # `variable_id` itself, so `variable_id` must contain at least one non-slash
-            # character. Multiple slashes are coalesced into single slash character.
-            # Each path segment should follow RFC 1035 segment specification.
-            # `len(variable_id)` must be less than 256 bytes.
-            # The name is assigned by the client, but will be validated on the server
-            # side to adhere to the format.
-            # Name is immutable and cannot be changed.
+        "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+            # the outcome of the `variables().watch` call and is visible through the
+            # `get` and `list` calls.
+        "value": "A String", # The binary value of the variable. The length of the value must be less
+            # than 4096 bytes. Empty values are also accepted. The value must be
+            # Base64 encoded.
+            # NB: Only one of value and string_value can be set at the same time.
+        "name": "A String", # The name of the variable resource, in the format:
+            #
+            #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+            #
+            # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+            # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+            # file path naming.
+            #
+            # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+            # dashes. Slashes are used as path element separators and are not part of the
+            # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+            # non-slash character. Multiple slashes are coalesced into single slash
+            # character. Each path segment should follow RFC 1035 segment specification.
+            # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+            #
+            # Once you create a variable, you cannot change the variable name.
       },
     ],
   }</pre>
@@ -320,37 +366,44 @@
   <pre>Updates an existing variable with a new value.
 
 Args:
-  name: string, The name of the variable to update.
-In the format of:
-"projects/{project_id}/configs/{config_id}/variables/{variable_id}" (required)
+  name: string, The name of the variable to update, in the format:
+
+`projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]` (required)
   body: object, The request body. (required)
     The object takes the form of:
 
-{ # Variable message describes a single variable within a Configuration object.
-    # name denotes the hierarchical variable name, e.g.
-    # ports/serving_port within flags configuration object.
-    # Value is an opaque string and only leaf variables can have values.
+{ # Describes a single variable within a RuntimeConfig resource.
+    # The name denotes the hierarchical variable name. For example,
+    # `ports/serving_port` is a valid variable name. The variable value is an
+    # opaque string and only leaf variables can have values (that is, variables
+    # that do not have any child variables).
+  "text": "A String", # The textual value of the variable. The length of the value must be less
+      # than 4096 bytes. Empty values are also accepted.
+      # NB: Only one of value and string_value can be set at the same time.
   "updateTime": "A String", # [Output Only] The time of the last variable update.
-  "state": "A String", # [Ouput only] The current state of the variable.
-      # State denotes the outcome of the Watch call and is unset by the Get/List
-      # calls.
-  "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-      # value must be Base64 encoded.
-  "name": "A String", # Name of the variable resource.
-      # It has format of
-      # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-      # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-      # must be a valid RuntimeConfig object and `variable_id` follows Unix
-      # file system file path naming.
-      # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-      # Slashes are used as path element separators and are not part of the
-      # `variable_id` itself, so `variable_id` must contain at least one non-slash
-      # character. Multiple slashes are coalesced into single slash character.
-      # Each path segment should follow RFC 1035 segment specification.
-      # `len(variable_id)` must be less than 256 bytes.
-      # The name is assigned by the client, but will be validated on the server
-      # side to adhere to the format.
-      # Name is immutable and cannot be changed.
+  "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+      # the outcome of the `variables().watch` call and is visible through the
+      # `get` and `list` calls.
+  "value": "A String", # The binary value of the variable. The length of the value must be less
+      # than 4096 bytes. Empty values are also accepted. The value must be
+      # Base64 encoded.
+      # NB: Only one of value and string_value can be set at the same time.
+  "name": "A String", # The name of the variable resource, in the format:
+      # 
+      #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+      # 
+      # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+      # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+      # file path naming.
+      # 
+      # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+      # dashes. Slashes are used as path element separators and are not part of the
+      # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+      # non-slash character. Multiple slashes are coalesced into single slash
+      # character. Each path segment should follow RFC 1035 segment specification.
+      # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+      # 
+      # Once you create a variable, you cannot change the variable name.
 }
 
   x__xgafv: string, V1 error format.
@@ -361,54 +414,71 @@
 Returns:
   An object of the form:
 
-    { # Variable message describes a single variable within a Configuration object.
-      # name denotes the hierarchical variable name, e.g.
-      # ports/serving_port within flags configuration object.
-      # Value is an opaque string and only leaf variables can have values.
+    { # Describes a single variable within a RuntimeConfig resource.
+      # The name denotes the hierarchical variable name. For example,
+      # `ports/serving_port` is a valid variable name. The variable value is an
+      # opaque string and only leaf variables can have values (that is, variables
+      # that do not have any child variables).
+    "text": "A String", # The textual value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted.
+        # NB: Only one of value and string_value can be set at the same time.
     "updateTime": "A String", # [Output Only] The time of the last variable update.
-    "state": "A String", # [Ouput only] The current state of the variable.
-        # State denotes the outcome of the Watch call and is unset by the Get/List
-        # calls.
-    "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-        # value must be Base64 encoded.
-    "name": "A String", # Name of the variable resource.
-        # It has format of
-        # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-        # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-        # must be a valid RuntimeConfig object and `variable_id` follows Unix
-        # file system file path naming.
-        # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-        # Slashes are used as path element separators and are not part of the
-        # `variable_id` itself, so `variable_id` must contain at least one non-slash
-        # character. Multiple slashes are coalesced into single slash character.
-        # Each path segment should follow RFC 1035 segment specification.
-        # `len(variable_id)` must be less than 256 bytes.
-        # The name is assigned by the client, but will be validated on the server
-        # side to adhere to the format.
-        # Name is immutable and cannot be changed.
+    "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+        # the outcome of the `variables().watch` call and is visible through the
+        # `get` and `list` calls.
+    "value": "A String", # The binary value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted. The value must be
+        # Base64 encoded.
+        # NB: Only one of value and string_value can be set at the same time.
+    "name": "A String", # The name of the variable resource, in the format:
+        #
+        #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+        #
+        # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+        # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+        # file path naming.
+        #
+        # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+        # dashes. Slashes are used as path element separators and are not part of the
+        # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+        # non-slash character. Multiple slashes are coalesced into single slash
+        # character. Each path segment should follow RFC 1035 segment specification.
+        # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+        #
+        # Once you create a variable, you cannot change the variable name.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="watch">watch(name, body, x__xgafv=None)</code>
-  <pre>WatchVariable watches for a variable to change and then returns the new
-value or times out.
-If variable is deleted while being watched, VariableState will be DELETED
-and the Value will contain the last known value.
-If the operation deadline is set to a larger value than internal timeout
-existing, current variable value will be returned and Variable state will
-be VARIABLE_STATE_UNSPECIFIED.
+    <code class="details" id="watch">watch(name=None, body, x__xgafv=None)</code>
+  <pre>Watches a specific variable and waits for a change in the variable's value.
+When there is a change, this method returns the new value or times out.
+
+If a variable is deleted while being watched, the `variableState` state is
+set to `DELETED` and the method returns the last known variable `value`.
+
+If you set the deadline for watching to a larger value than internal timeout
+(60 seconds), the current variable value is returned and the `variableState`
+will be `VARIABLE_STATE_UNSPECIFIED`.
+
+To learn more about creating a watcher, read the
+[Watching a Variable for Changes](/deployment-manager/runtime-configurator/watching-a-variable)
+documentation.
 
 Args:
-  name: string, The name of the variable to retrieve. (required)
+  name: string, The name of the variable to watch, in the format:
+
+`projects/[PROJECT_ID]/configs/[CONFIG_NAME]` (required)
   body: object, The request body. (required)
     The object takes the form of:
 
 { # Request for the `WatchVariable()` method.
-    "newerThan": "A String", # If backend has a variable that has a newer value than this timestamp, then
-        # request will return immediately with current value.
-        # If not specified or variable has an older timestamp, will wait for the new
-        # value.
+    "newerThan": "A String", # If specified, checks the current timestamp of the variable and if the
+        # current timestamp is newer than `newerThan` timestamp, the method returns
+        # immediately.
+        # 
+        # If not specified or the variable has an older timestamp, the watcher waits
+        # for a the value to change before returning.
   }
 
   x__xgafv: string, V1 error format.
@@ -419,31 +489,38 @@
 Returns:
   An object of the form:
 
-    { # Variable message describes a single variable within a Configuration object.
-      # name denotes the hierarchical variable name, e.g.
-      # ports/serving_port within flags configuration object.
-      # Value is an opaque string and only leaf variables can have values.
+    { # Describes a single variable within a RuntimeConfig resource.
+      # The name denotes the hierarchical variable name. For example,
+      # `ports/serving_port` is a valid variable name. The variable value is an
+      # opaque string and only leaf variables can have values (that is, variables
+      # that do not have any child variables).
+    "text": "A String", # The textual value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted.
+        # NB: Only one of value and string_value can be set at the same time.
     "updateTime": "A String", # [Output Only] The time of the last variable update.
-    "state": "A String", # [Ouput only] The current state of the variable.
-        # State denotes the outcome of the Watch call and is unset by the Get/List
-        # calls.
-    "value": "A String", # `len(value)` must be less than 4096 bytes. Empty values are also accepted.
-        # value must be Base64 encoded.
-    "name": "A String", # Name of the variable resource.
-        # It has format of
-        # "projects/{project_id}/configs/{config_id}/variables/{variable_id}",
-        # Where `project_id` must be a valid Google Cloud project ID, `config_id`
-        # must be a valid RuntimeConfig object and `variable_id` follows Unix
-        # file system file path naming.
-        # `variable_id` can contain ASCII letters, numbers, slashes and dashes.
-        # Slashes are used as path element separators and are not part of the
-        # `variable_id` itself, so `variable_id` must contain at least one non-slash
-        # character. Multiple slashes are coalesced into single slash character.
-        # Each path segment should follow RFC 1035 segment specification.
-        # `len(variable_id)` must be less than 256 bytes.
-        # The name is assigned by the client, but will be validated on the server
-        # side to adhere to the format.
-        # Name is immutable and cannot be changed.
+    "state": "A String", # [Ouput only] The current state of the variable. The variable state indicates
+        # the outcome of the `variables().watch` call and is visible through the
+        # `get` and `list` calls.
+    "value": "A String", # The binary value of the variable. The length of the value must be less
+        # than 4096 bytes. Empty values are also accepted. The value must be
+        # Base64 encoded.
+        # NB: Only one of value and string_value can be set at the same time.
+    "name": "A String", # The name of the variable resource, in the format:
+        #
+        #     projects/[PROJECT_ID]/configs/[CONFIG_NAME]/variables/[VARIABLE_NAME]
+        #
+        # The `[PROJECT_ID]` must be a valid project ID, `[CONFIG_NAME]` must be a
+        # valid RuntimeConfig reource and `[VARIABLE_NAME]` follows Unix file system
+        # file path naming.
+        #
+        # The `[VARIABLE_NAME]` can contain ASCII letters, numbers, slashes and
+        # dashes. Slashes are used as path element separators and are not part of the
+        # `[VARIABLE_NAME]` itself, so `[VARIABLE_NAME]` must contain at least one
+        # non-slash character. Multiple slashes are coalesced into single slash
+        # character. Each path segment should follow RFC 1035 segment specification.
+        # The length of a `[VARIABLE_NAME]` must be less than 256 bytes.
+        #
+        # Once you create a variable, you cannot change the variable name.
   }</pre>
 </div>