The MCP Transparency Problem: When Your Agent Can't Show Its Work

MCP agents act on your behalf but can't prove what they did. Logs are self-reported claims. Receipts are independently verifiable evidence. Here's how to close the transparency gap with cryptographic proof -- in under 10 lines of code. The MCP Transparency Problem: When Your Agent Can't Show Its Work You ask your AI agent to cancel a subscription, send an email to a client, or update a database record. The agent says "Done." You move on. But what actually happened? Which API endpoint was called? What payload was sent? What did the service respond? You don't know -- and neither does anyone else. The agent acted on your behalf, and the only record of that action is the agent's own word. This is the transparency problem in MCP. Every tool call is a black box: an input goes in, a result comes out, and the specifics of what happened between the two are discarded the moment the call completes. That might be acceptable for a search query. It is not acceptable when the agent is sending emails,