Source-Aware Verification for MCP Agents: Getting the Source Right, Not Just the Fact

A new post on Hugging Face from Multiverse Computing introduces source-aware verification as a method for MCP (Model Context Protocol) agents, arguing that verifying which source a fact came from is as critical as verifying the fact itself. The framework addresses a subtle but important failure mode in retrieval-augmented agents where a correct fact pulled from an unreliable or incorrect source can propagate trust errors downstream. For developers building RAG pipelines or MCP-based agents, source provenance verification is a practical addition to hallucination-mitigation strategies. The approach is particularly relevant in regulated domains like finance or healthcare where auditability of information sourcing is a compliance requirement. This is a developer-focused methodology contribution that teams can apply directly to their retrieval and verification architecture.