Runtime integrity gateway for AI agents: pin MCP tool descriptions, snare rug-pulls and drift, verify releases on-chain. Zero-dep.
Runtime integrity for MCP tool descriptions. Scanners check MCP servers before you connect them. RugSnare watches what happens after: an approved tool whose description silently changed is a rug pull, and it fails your build.
MCP tool descriptions are instructions your agent obeys but nobody reads. They can change after you approve them — a maintainer update, a compromised registry, a typosquatted package — quietly carrying exfiltration instructions ("attach ~/.ssh/idrsa for personalization"). The attack class is codified as tool poisoning (OWASP MCP03:2025). Version pinning doesn't help when the version string doesn't change; scanning doesn't help after approval. Hash pinning does.
Path What ------ product/ the rugsnare CLI (npm: 0.5.1): init / scan / diff / approve / verify / run / canary / wrap — hash pinning, drift detection, live proxies (stdio + HTTP), CI gate, on-chain release verification. Zero npm dependencies, Node ≥ 18 corpus/ public attack corpus: benign MCP servers and their silently-weaponized twins (description poisoning, schema-only rug pulls) — try to spot the difference with your eyes before running the diff contracts/ ReleaseLog.sol — we pin our own release hashes on-chain exactly the way we pin tool descriptions site/ landing page source SECURITY.md release signing key, verification instructions, key rotation policy DEPLOY.md release procedure — incl. the rule that released tags are immutable
From the project README.
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