fix: resolve CI test failures for Bedrock provider

- Fix test assertion to match actual error message
- Add missing has_model method to FakeModelStore mock
- Remove redundant comments and update docs

docs/docs/providers/safety/remote_bedrock.mdx

@@ -19,7 +19,7 @@ AWS Bedrock safety provider for content moderation using AWS's safety services.
 | `aws_access_key_id` | `str \| None` | No |  | The AWS access key to use. Default use environment variable: AWS_ACCESS_KEY_ID |
 | `aws_secret_access_key` | `str \| None` | No |  | The AWS secret access key to use. Default use environment variable: AWS_SECRET_ACCESS_KEY |
 | `aws_session_token` | `str \| None` | No |  | The AWS session token to use. Default use environment variable: AWS_SESSION_TOKEN |
-| `region_name` | `str \| None` | No | us-east-2 | The default AWS Region to use, for example, us-west-1 or us-west-2.Default use environment variable: AWS_DEFAULT_REGION |
+| `region_name` | `str \| None` | No |  | The default AWS Region to use, for example, us-west-1 or us-west-2.Default use environment variable: AWS_DEFAULT_REGION |
 | `profile_name` | `str \| None` | No |  | The profile name that contains credentials to use.Default use environment variable: AWS_PROFILE |
 | `total_max_attempts` | `int \| None` | No |  | An integer representing the maximum number of attempts that will be made for a single request, including the initial attempt. Default use environment variable: AWS_MAX_ATTEMPTS |
 | `retry_mode` | `str \| None` | No |  | A string representing the type of retries Boto3 will perform.Default use environment variable: AWS_RETRY_MODE |

src/llama_stack/providers/remote/inference/bedrock/bedrock.py

@@ -95,9 +95,8 @@ class BedrockInferenceAdapter(OpenAIMixin):
             result = await super().openai_chat_completion(params=params)
             logger.debug(f"Bedrock API returned: {type(result).__name__ if result is not None else 'None'}")
 
-            # Defensive check for unexpected None response
             if result is None:
-                logger.error(f"OpenAI client returned None for model={params.model}, stream={params.stream}")
+                logger.error(f"Bedrock OpenAI client returned None for model={params.model}, stream={params.stream}")
                 raise RuntimeError(
                     f"Bedrock API returned no response for model '{params.model}'. "
                     "This may indicate the model is not supported or a network/API issue occurred."
@@ -105,7 +104,6 @@ class BedrockInferenceAdapter(OpenAIMixin):
 
             return result
         except AuthenticationError as e:
-            # Extract detailed error message from the exception
             error_msg = str(e)
 
             # Check if this is a token expiration error

tests/unit/providers/inference/test_bedrock_adapter.py

@@ -31,11 +31,8 @@ def test_client_url_construction():
 
 
 def test_api_key_from_config():
-    """Test API key is stored as SecretStr in auth_credential"""
     config = BedrockConfig(api_key="config-key", region_name="us-east-1")
     adapter = BedrockInferenceAdapter(config=config)
-
-    # API key is stored in auth_credential field (SecretStr)
     assert adapter.config.auth_credential.get_secret_value() == "config-key"
 
 
@@ -75,7 +72,7 @@ async def test_authentication_error_handling():
             await adapter.openai_chat_completion(params=params)
 
         assert "AWS Bedrock authentication failed" in str(exc_info.value)
-        assert "Please check your API key" in str(exc_info.value)
+        assert "Please verify your API key" in str(exc_info.value)
     finally:
         # Restore original method
         BedrockInferenceAdapter.__bases__[0].openai_chat_completion = original_method

tests/unit/providers/test_bedrock.py

@@ -38,6 +38,9 @@ async def test_basic_chat_completion():
     adapter = BedrockInferenceAdapter(config=config)
 
     class FakeModelStore:
+        async def has_model(self, model_id):
+            return True
+
         async def get_model(self, model_id):
             return SimpleNamespace(provider_resource_id="meta.llama3-1-8b-instruct-v1:0")