▶ Interactive Lab

MCP Tool Registry

Inspect tool schemas; see how the LLM picks a tool.

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LLM reads tool descriptions and picks the best match. Description quality = correctness.

What you're seeing

Tool registry: list of tools with name, description, JSON schema for arguments. LLM reads all of them on every call and decides which to invoke.

Tool description quality is the #1 factor in tool-use accuracy. Vague descriptions → wrong tool picked. Specific descriptions + good few-shot examples → near-perfect dispatch.

★ KEY TAKEAWAY
LLM reads tool descriptions and picks the best match. Description quality = correctness.
▶ WHAT TO TRY
  • Type a query and click Match tools.
  • Best-matching tool turns green — that's what the LLM would call.