mcp-mcp-client-error-han-mcp-client-fails-to-raise-exception-on-unexpected--6e577bf2

THEN Implement content type validation in the streamablehttp_client or ClientSession to raise an exception (e.g., ValueError) when the server responds with a content type other than the expected MCP JSON stream. This allows calling code to catch and handle misconfigured endpoints or unreachable servers gracefully.

# Workaround: manually check content type before session initialization
async with streamablehttp_client(url) as (read, write, _):
    # Optionally inspect read stream headers if accessible
    async with ClientSession(read, write) as session:
        try:
            await session.initialize()
        except Exception as e:
            print(f"Initialization failed: {e}")