So far, we’ve focused on how MCP systems work and how to design tools properly. But here’s the part that many overlook: What happens when the model makes a bad decision ? Because it will. 🧠 The Core Reality LLMs are powerful, but they are not perfect. They can: misunderstand intent generate incorrect arguments attempt unsafe actions ⚠️ Why This Matters In an MCP system, the model can trigger real actions: cancel orders send emails update data If you don’t have guardrails: 👉 small mistakes can turn into real problems 🔥 Key Mindset Treat the model like: An intelligent but untrusted assistant It can help — but it must be validated and controlled . 🧩 Where Security Lives Most guardrails are enforced in: 👉 the MCP server 👉 partially in the MCP client 🔐 1.…