The tool's request schema omitted productcode, which catalog-api requires
(ProductRequest in openapi.yaml lists it among the eight required fields).
Since the declared schema is the only thing an MCP caller sees, there was no
input that worked: omit it and the API answers
{"productcode":["This field is required."]}; supply it and ai-mcp-proxy rejects
the call first with "Additional properties are not allowed ('productcode' was
unexpected)".
The schema now mirrors ProductRequest — productcode added, the same eight
fields marked required, and the length and format constraints carried over so
a model reads them rather than guessing.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Stéphane Tailland
c583d28cff