Update docs
diff --git a/docs/dyn/compute_v1.firewalls.html b/docs/dyn/compute_v1.firewalls.html
index 65f44f3..e3f17d8 100644
--- a/docs/dyn/compute_v1.firewalls.html
+++ b/docs/dyn/compute_v1.firewalls.html
@@ -129,7 +129,7 @@
             # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
           {
             "value": "A String", # [Output Only] A warning data value corresponding to the key.
-            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource, and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
+            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
           },
         ],
       },
@@ -144,7 +144,7 @@
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
@@ -171,6 +171,8 @@
       "sourceTags": [ # A list of instance tags which this rule applies to. One or both of sourceRanges and sourceTags may be set.
           #
           # If both properties are set, an inbound connection is allowed if the range matches the sourceRanges OR the tag of the source matches the sourceTags property. The connection does not need to match both properties.
+          #
+          # Source tags cannot be used to allow access to an instance's external IP address. Because tags are associated with an instance, not an IP address, source tags can only be used to control traffic traveling from an instance inside the same network as the firewall.
         "A String",
       ],
       "sourceRanges": [ # The IP address blocks that this rule applies to, expressed in CIDR format. One or both of sourceRanges and sourceTags may be set.
@@ -219,6 +221,8 @@
     "sourceTags": [ # A list of instance tags which this rule applies to. One or both of sourceRanges and sourceTags may be set.
         # 
         # If both properties are set, an inbound connection is allowed if the range matches the sourceRanges OR the tag of the source matches the sourceTags property. The connection does not need to match both properties.
+        # 
+        # Source tags cannot be used to allow access to an instance's external IP address. Because tags are associated with an instance, not an IP address, source tags can only be used to control traffic traveling from an instance inside the same network as the firewall.
       "A String",
     ],
     "sourceRanges": [ # The IP address blocks that this rule applies to, expressed in CIDR format. One or both of sourceRanges and sourceTags may be set.
@@ -277,7 +281,7 @@
             # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
           {
             "value": "A String", # [Output Only] A warning data value corresponding to the key.
-            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource, and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
+            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
           },
         ],
       },
@@ -292,7 +296,7 @@
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
@@ -314,11 +318,11 @@
 
 The field_name is the name of the field you want to compare. Only atomic field types are supported (string, number, boolean). The comparison_string must be either eq (equals) or ne (not equals). The literal_string is the string value to filter to. The literal value must be valid for the type of field you are filtering by (string, number, boolean). For string fields, the literal value is interpreted as a regular expression using RE2 syntax. The literal value must match the entire field.
 
-For example, to filter for instances whose name is not equal to example-instance, you would use filter=name ne example-instance.
+For example, to filter for instances that do not have a name of example-instance, you would use filter=name ne example-instance.
 
-Compute Engine Beta API Only: If you use filtering in the Beta API, you can also filter on nested fields. For example, you could filter on instances that have set the scheduling.automaticRestart field to true. In particular, use filtering on nested fields to take advantage of instance labels to organize and filter results based on label values.
+Compute Engine Beta API Only: When filtering in the Beta API, you can also filter on nested fields. For example, you could filter on instances that have set the scheduling.automaticRestart field to true. Use filtering on nested fields to take advantage of labels to organize and search for results based on label values.
 
-The Beta API also supports filtering on multiple expressions by providing each separate expression within parentheses. For example, (scheduling.automaticRestart eq true) (zone eq us-central1-f). Multiple expressions are treated as AND expressions meaning that resources must match all expressions to pass the filters.
+The Beta API also supports filtering on multiple expressions by providing each separate expression within parentheses. For example, (scheduling.automaticRestart eq true) (zone eq us-central1-f). Multiple expressions are treated as AND expressions, meaning that resources must match all expressions to pass the filters.
 
 Returns:
   An object of the form:
@@ -332,6 +336,8 @@
           "sourceTags": [ # A list of instance tags which this rule applies to. One or both of sourceRanges and sourceTags may be set.
               #
               # If both properties are set, an inbound connection is allowed if the range matches the sourceRanges OR the tag of the source matches the sourceTags property. The connection does not need to match both properties.
+              #
+              # Source tags cannot be used to allow access to an instance's external IP address. Because tags are associated with an instance, not an IP address, source tags can only be used to control traffic traveling from an instance inside the same network as the firewall.
             "A String",
           ],
           "sourceRanges": [ # The IP address blocks that this rule applies to, expressed in CIDR format. One or both of sourceRanges and sourceTags may be set.
@@ -400,6 +406,8 @@
     "sourceTags": [ # A list of instance tags which this rule applies to. One or both of sourceRanges and sourceTags may be set.
         # 
         # If both properties are set, an inbound connection is allowed if the range matches the sourceRanges OR the tag of the source matches the sourceTags property. The connection does not need to match both properties.
+        # 
+        # Source tags cannot be used to allow access to an instance's external IP address. Because tags are associated with an instance, not an IP address, source tags can only be used to control traffic traveling from an instance inside the same network as the firewall.
       "A String",
     ],
     "sourceRanges": [ # The IP address blocks that this rule applies to, expressed in CIDR format. One or both of sourceRanges and sourceTags may be set.
@@ -458,7 +466,7 @@
             # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
           {
             "value": "A String", # [Output Only] A warning data value corresponding to the key.
-            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource, and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
+            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
           },
         ],
       },
@@ -473,7 +481,7 @@
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },
@@ -499,6 +507,8 @@
     "sourceTags": [ # A list of instance tags which this rule applies to. One or both of sourceRanges and sourceTags may be set.
         # 
         # If both properties are set, an inbound connection is allowed if the range matches the sourceRanges OR the tag of the source matches the sourceTags property. The connection does not need to match both properties.
+        # 
+        # Source tags cannot be used to allow access to an instance's external IP address. Because tags are associated with an instance, not an IP address, source tags can only be used to control traffic traveling from an instance inside the same network as the firewall.
       "A String",
     ],
     "sourceRanges": [ # The IP address blocks that this rule applies to, expressed in CIDR format. One or both of sourceRanges and sourceTags may be set.
@@ -557,7 +567,7 @@
             # "data": [ { "key": "scope", "value": "zones/us-east1-d" }
           {
             "value": "A String", # [Output Only] A warning data value corresponding to the key.
-            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource, and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
+            "key": "A String", # [Output Only] A key that provides more detail on the warning being returned. For example, for warnings where there are no results in a list request for a particular zone, this key might be scope and the key value might be the zone name. Other examples might be a key indicating a deprecated resource and a suggested replacement, or a warning about invalid network settings (for example, if an instance attempts to perform IP forwarding but is not enabled for IP forwarding).
           },
         ],
       },
@@ -572,7 +582,7 @@
         {
           "message": "A String", # [Output Only] An optional, human-readable error message.
           "code": "A String", # [Output Only] The error type identifier for this error.
-          "location": "A String", # [Output Only] Indicates the field in the request which caused the error. This property is optional.
+          "location": "A String", # [Output Only] Indicates the field in the request that caused the error. This property is optional.
         },
       ],
     },