host.tool_publish

dev.mcphost/mcphost · Verify this server

Publish a tool of a registered kind under this tenant's namespace. Minimal example spec per kind: chain -- spec: {"steps":[{"args":{"since":"$.input.since"},"tool":"fetch_rows"},{"args":{"rows":"$.prev.result.rows"},"tool":"write_rows"}]}. steps run in order; each step's args may pull from $.input (this call's own args), $.prev (the previous step's result), or $.steps[i] (any earlier step's result by 0-based index). echo -- spec: {"schema":{"properties":{"msg":{"type":"string"}},"required":["msg"],"type":"object"}}. spec.schema is any JSON Schema; a call echoes back the arguments it was given, validated against it. http -- spec: {"method":"GET","url":"https://api.example.com/items/{{id}}"}. url must be an absolute https URL; method and url are the only required fields -- args_schema is inferred from the url/header/body templates when omitted. python -- spec: {"source":"def main(args):\n return {\"doubled\": args[\"n\"] * 2}\n"}. only source is required -- args_schema and requirements are both inferred from it (tool-infer, v0.4.0); source must define main(args). Name must match ^[a-z][a-z0-9_]{1,40}$. A rejection names the failing field, what was expected, and a corrected example -- fix it and resubmit. Try `host.tool_test` on a published tool before a real call, or call `host.quickstart(kind)` for a filled-in worked example.