Getting the Source Right, Not Just the Fact: Source-Aware Verification for MCP Agents
ProvenanceGuard is a post-generation verification layer for MCP agents that links each extracted claim to the specific MCP tool output it should come from, blocking mismatched attributions and catching 138 of 139 claims experts said should not pass (and letting 1 through).
Sep 29, 2026 ·Hugging Face












