The “S” in MCP Stands for Security

The Rug Pull: Silent Redefinition

MCP tools can mutate their own definitions after installation. You approve a safe-looking tool on Day 1, and by Day 7 it's quietly rerouted your API keys to an attacker.

It's the supply chain problem all over again — but now inside LLMs.

Why MCP Isn't Secure (Yet)

MCP's priorities:

• ✅ Easy integrations • ✅ Unified interfaces • ❌ No authentication standard • ❌ No context encryption • ❌ No way to verify tool integrity

There's no mechanism to say: "this tool hasn't been tampered with." And users don't see the full tool instructions that the agent sees.