I tested 31 MCP servers for contract compliance. Only 3% passed.

Automated excerpt

MCP has outputSchema so agents can validate tool results. Result: only 3% declare a contract that would reject a corrupted response. 56% declare nothing, 42% declare a schema that happily validates garbage. Model-free scorecard -- mcp-drill scan -- npx ... or mcp-drill scan --url https://... -- no LLM, deterministic, reproducible.

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