After set_access_grants, the handler was reloading the same knowledge record via get_knowledge_by_id, which triggers an extra SELECT plus a nested fetch of access grants. set_access_grants already returns the newly-written grants and the local knowledge object is otherwise unchanged, so update it in place and reuse it for the response. https://claude.ai/code/session_01S18Lgqbih7Ry2JZUUv8TxF Co-authored-by: Claude <noreply@anthropic.com>