feat(mcp): add aws_iam_streamablehttp_client (#339)

Author: dbschmigelski

docs/user-guide/concepts/tools/mcp-tools.md

@@ -154,6 +154,30 @@ For HTTP-based MCP servers that use Streamable HTTP transport:
         lambda: streamablehttp_client("http://localhost:8000/mcp")
     )
 
+#### AWS IAM
+
+For MCP servers on AWS that use SigV4 authentication with IAM credentials, you can conveniently use the [`mcp-proxy-for-aws`](https://pypi.org/project/mcp-proxy-for-aws/) package to handle AWS credential management and request signing automatically. See the [detailed guide](https://dev.to/aws/no-oauth-required-an-mcp-client-for-aws-iam-k1o) for more information.
+
+First, install the package:
+
+```bash
+pip install mcp-proxy-for-aws
+```
+
+Then you use it like any other transport:
+
+```python
+from mcp_proxy_for_aws.client import aws_iam_streamablehttp_client
+from strands.tools.mcp import MCPClient
+
+mcp_client = MCPClient(lambda: aws_iam_streamablehttp_client(
+    endpoint="https://your-service.us-east-1.amazonaws.com/mcp",
+    aws_region="us-east-1",
+    aws_service="bedrock-agentcore"
+))
+```
+
+### 3. Server-Sent Events (SSE)
     with streamable_http_mcp_client:
         tools = streamable_http_mcp_client.list_tools_sync()
         agent = Agent(tools=tools)