
We Audited Our Own MCP Server. We Failed.
We applied Uber's software-factory method to our own MCP server and measured 13,200 tokens of tool schema across 20 tools, about 660 per tool — against the roughly 22K across 49 tools Uber cited for a third-party suite. Descriptions were more than half of it. The harness, the two patterns we got wrong, and a dead JSON Schema header that most servers built on the official MCP SDK are carrying without knowing.
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