Name revision
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h
index 4b28cad..7645bb1 100644
--- a/src/objective-c/GRPCClient/GRPCCall.h
+++ b/src/objective-c/GRPCClient/GRPCCall.h
@@ -155,15 +155,15 @@
 };
 
 /**
- * Flags for options of a gRPC call
- *
+ * Safety remark of a gRPC method as defined in RFC 2616 Section 9.1
  */
-typedef NS_ENUM(NSUInteger, GRPCCallAttr) {
-  GRPCCallAttrDefault = 0,
-  /** Signal that the call is idempotent */
-  GRPCCallAttrIdempotentRequest = 1,
-  /** Signal that the call is cacheable. GRPC is free to use GET verb */
-  GRPCCallAttrCacheableRequest = 2,
+typedef NS_ENUM(NSUInteger, GRPCCallSafety) {
+  /** Signal that there is no guarantees on how the call affects the server state. */
+  GRPCCallSafetyDefault = 0,
+  /** Signal that the call is idempotent. gRPC is free to use PUT verb. */
+  GRPCCallSafetyIdempotentRequest = 1,
+  /** Signal that the call is cacheable and will not affect server state. gRPC is free to use GET verb. */
+  GRPCCallSafetyCacheableRequest = 2,
 };
 
 /**
@@ -251,7 +251,7 @@
  * Host parameter should not contain the scheme (http:// or https://), only the name or IP addr
  * and the port number, for example @"localhost:5050".
  */
-+ (void)setCallAttribute:(GRPCCallAttr)callAttr host:(NSString *)host path:(NSString *)path;
++ (void)setCallSafety:(GRPCCallSafety)callSafety host:(NSString *)host path:(NSString *)path;
 
 // TODO(jcanizales): Let specify a deadline. As a category of GRXWriter?
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 2c0b779..4320434 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -110,16 +110,16 @@
   callFlags = [NSMutableDictionary dictionary];
 }
 
-+ (void)setCallAttribute:(GRPCCallAttr)callAttr host:(NSString *)host path:(NSString *)path {
-  NSString *hostAndPath = [NSString stringWithFormat:@"%@%@", host, path];
-  switch (callAttr) {
-    case GRPCCallAttrDefault:
++ (void)setCallSafety:(GRPCCallSafety)callSafety host:(NSString *)host path:(NSString *)path {
+  NSString *hostAndPath = [NSString stringWithFormat:@"%@/%@", host, path];
+  switch (callSafety) {
+    case GRPCCallSafetyDefault:
       callFlags[hostAndPath] = @0;
       break;
-    case GRPCCallAttrIdempotentRequest:
+    case GRPCCallSafetyIdempotentRequest:
       callFlags[hostAndPath] = @GRPC_INITIAL_METADATA_IDEMPOTENT_REQUEST;
       break;
-    case GRPCCallAttrCacheableRequest:
+    case GRPCCallSafetyCacheableRequest:
       callFlags[hostAndPath] = @GRPC_INITIAL_METADATA_CACHEABLE_REQUEST;
       break;
     default:
@@ -127,13 +127,9 @@
   }
 }
 
-+ (uint32_t)getCallFlag:(NSString *)host path:(NSString *)path {
-  NSString *hostAndPath = [NSString stringWithFormat:@"%@%@", host, path];
-  if (nil != [callFlags objectForKey:hostAndPath]) {
-    return [callFlags[hostAndPath] intValue];
-  } else {
-    return 0;
-  }
++ (uint32_t)callFlagsForHost:(NSString *)host path:(NSString *)path {
+  NSString *hostAndPath = [NSString stringWithFormat:@"%@/%@", host, path];
+  return [callFlags[hostAndPath] intValue];
 }
 
 - (instancetype)init {
@@ -259,7 +255,7 @@
 - (void)sendHeaders:(NSDictionary *)headers {
   // TODO(jcanizales): Add error handlers for async failures
   [_wrappedCall startBatchWithOperations:@[[[GRPCOpSendMetadata alloc] initWithMetadata:headers
-                                                                                  flags:(uint32_t)[GRPCCall getCallFlag:_host path:_path]
+                                                                                  flags:[GRPCCall callFlagsForHost:_host path:_path]
                                                                                 handler:nil]]];
 }