3 Agent Integration Patterns for Claim Verification (LangChain + CrewAI + MCP)

Your agent generates a claim. Then what? In most agent pipelines: nothing. The claim flows straight into the next action — a tool call, a database write, a message sent. If the claim is wrong, the action is wrong, and the first person to notice is usually the user. There are three patterns that fix this. Each one adds a verification step between generation and action — pre-action claim verification — and each one fits a different stage of agent maturity. All three pattern