Python: fail fast on MCP streamable HTTP 401/403 #13458
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Summary
This PR improves the Python MCP Streamable HTTP connector to fail fast on authentication / authorization issues.
MCPStreamableHttpPlugin.__aenter__and raisesKernelPluginInvalidConfigurationErroron HTTP 401/403.Why
When credentials or permissions are misconfigured, the server returns 401/403 and the plugin should error clearly and immediately, instead of failing later during session setup.
Tests
httpx.AsyncClient:401/403raisesKernelPluginInvalidConfigurationError200proceeds successfullyRelated
microsoft/semantic-kernel#13414