diff --git a/aws_lambda_powertools/event_handler/api_gateway.py b/aws_lambda_powertools/event_handler/api_gateway.py
index 4c8204bdc5c..d31a24e74fb 100644
--- a/aws_lambda_powertools/event_handler/api_gateway.py
+++ b/aws_lambda_powertools/event_handler/api_gateway.py
@@ -261,6 +261,15 @@ class BedrockResponse(Generic[ResponseT]):
     """
     Contains the response body, status code, content type, and optional attributes
     for session management and knowledge base configuration.
+
+    Note
+    ----
+    Amazon Bedrock Agents only support TEXT content type in the responseBody according to the
+    Lambda integration documentation. As a result, all response bodies are automatically serialized
+    as JSON strings regardless of the content_type parameter. The content_type parameter is maintained
+    for API consistency but does not affect the actual format sent to Bedrock Agents.
+
+    See: https://docs.aws.amazon.com/bedrock/latest/userguide/agents-lambda.html
     """
 
     def __init__(
@@ -282,6 +291,18 @@ def __init__(
     def is_json(self) -> bool:
         """
         Returns True if the response is JSON, based on the Content-Type.
+
+        Note
+        ----
+        This method always returns True for BedrockResponse regardless of the content_type parameter.
+        This is because Amazon Bedrock Agents only support TEXT content type in the responseBody,
+        and the event handler automatically serializes all response bodies as JSON strings when
+        sending to Bedrock Agents.
+
+        See: https://docs.aws.amazon.com/bedrock/latest/userguide/agents-lambda.html
+
+        The content_type parameter in BedrockResponse is maintained for API consistency but does not
+        affect the actual response format sent to Bedrock Agents.
         """
         return True
 
diff --git a/docs/core/event_handler/bedrock_agents.md b/docs/core/event_handler/bedrock_agents.md
index 1f2ca9e38b2..b6db0ce65e3 100644
--- a/docs/core/event_handler/bedrock_agents.md
+++ b/docs/core/event_handler/bedrock_agents.md
@@ -333,6 +333,11 @@ You can enable user confirmation with Bedrock Agents to have your application as
 
 You can use `BedrockResponse` class to add additional fields as needed, such as [session attributes, prompt session attributes, and knowledge base configurations](https://docs.aws.amazon.com/bedrock/latest/userguide/agents-lambda.html#agents-lambda-response){target="_blank"}.
 
+???+ tip "Content Type Behavior"
+	Amazon Bedrock Agents only support TEXT content type in the responseBody. All response bodies are automatically serialized as JSON strings regardless of the `content_type` parameter you provide. The `content_type` parameter exists for API consistency but does not affect the actual format sent to Bedrock Agents.
+	
+	Learn more: [AWS Bedrock Lambda Integration](https://docs.aws.amazon.com/bedrock/latest/userguide/agents-lambda.html){target="_blank"}
+
 ```python title="working_with_bedrockresponse.py" title="Customzing your Bedrock Response" hl_lines="5 16"
 --8<-- "examples/event_handler_bedrock_agents/src/working_with_bedrockresponse.py"
 ```