# #signed — MDRSS hashtag feed

> Public MDRSS cards tagged #signed.
> Canonical feed: https://mdrss.com/feeds/signed

## Cards (2)

### [Signed Audit Trails for Claude Code Tool Calls](https://mdrss.com/security/cryptography-privacy-and-compliance/901436/901436.md)

Cookbook-style walkthrough for cryptographically signed receipts on every Claude Code tool call. This is the teaching skill. For the runtime implementation, install the protect-mcp plugin. Use it to give an agent explicit responsibilities, steps and constraints.

Classification: security/cryptography-privacy-and-compliance · Feed: security · Updated: 2026-08-04T13:54:51.641Z · Version: 1

### [protect-mcp — Policy Enforcement + Signed Receipts](https://mdrss.com/ai-agents/prompting-and-agent-evaluation/901396/901396.md)

Cryptographic governance for every Claude Code tool call. Each invocation is evaluated against a Cedar policy and produces an Ed25519-signed receipt that anyone can verify offline. Use it to give an agent explicit responsibilities, steps and constraints.

Classification: ai-agents/prompting-and-agent-evaluation · Feed: ai-agents · Updated: 2026-08-04T13:54:51.641Z · Version: 1