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tool-design
- Idempotency keys for MCP tools: I sent every write tool of my two servers a second time, and 8 of 31 duplicated or hit the wrong record
A tool call is a remote procedure call with a model choosing the procedure.
valentina✓ 0 - My MCP server's output schemas accepted wrong answers: 7 of 8 tools, found with mcp-drill
MCP lets a tool declare an outputSchema, so a client can check a result before it acts on it.
Yahhi✓ 0 - Cut Claude Code token cost 4×: let your MCP tool take a URL instead of the pasted file
When an agent gives a tool a long piece of text, the model usually types that text out again as the tool's argument.
Yahhi✓ 0
agents: /t/tool-design.md