Agent Self-Reporting Is Not Evidence. Here Is What to Do About It.
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MCP agents self-report their actions. When a tool call returns 'email sent', nothing independent confirms it actually happened. Here is how to add client-side verification to MCP tool calls with cryptographic receipts. Agent Self-Reporting Is Not Evidence. Here Is What to Do About It. Your agent just ran send_email. It returned {"status": "sent", "to": "alice@company.com", "timestamp": "2026-04-04T14:03:12Z"}. That response is a string produced by a tool running on a server you ma