Why Schema Drift Is the Silent Killer of MCP Deployments
Most teams that deploy MCP servers test them once, watch the agent call the right tool with the right arguments, and move on. That single successful run becomes the mental model for how the integration behaves forever. But schemas change. A field gets renamed, a parameter goes from optional to required, a return type shifts from a flat object to a nested one — and none of that shows up as a deployment event anywhere a human is watching. The agent doesn't crash. It just starts calling a tool against a description that's slightly wrong, and slightly wrong is so much worse than completely broken.
1. Why This Doesn't Look Like a Bug
A traditional typed client breaks the build the moment an API contract changes underneath it. That's the whole point of types — they turn a silent mismatch into a loud compile error before it ships. An agent...
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