Allow pre_mcp_call guardrail hooks to mutate outbound MCP headers#23889

Merged

ishaan-jaff merged 4 commits intoBerriAI:worktree-fluttering-sleeping-cookiefrom

Evernorth:feature/pre-mcp-call-hook-header-mutation

Mar 17, 2026

Commits on Mar 17, 2026

Allow pre_mcp_call guardrail hooks to mutate outbound MCP headers
noahnistler
committed
Enhance MCPServerManager to support hook-modified arguments and extra headers. Update tests to validate argument mutation and header injection behavior, including warnings for OpenAPI-backed server…
noahnistler
committed
Refactor MCPServerManager to raise HTTPException for extra headers in OpenAPI-backed servers. Update tests to reflect this change, ensuring proper exception handling instead of logging warnings.
noahnistler
committed
Update MCPServerManager to raise HTTPException with status code 400 for extra headers in OpenAPI-backed servers. Adjust tests to verify the correct status code and exception message.
noahnistler
committed