* fix(mcp): advertise JSON values without recursive schemas
`z.json()` projects a self-referential `$defs/__schema0` entry. Twenty
tool input schemas and 123 output schemas carried it, and clients or
model APIs that reject recursive JSON Schemas refuse the whole tool
list. Every JSON value satisfies `{}`, so the shared JSON value schema
now advertises that. Runtime parsing still admits only JSON values.
Refs #919
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(mcp): keep advertised input schemas within model function-calling limits
Some model providers reject the whole tool list when any input schema
contains a recursive $ref or nests deeper than 10 levels (fixes#919).
Sanitize the advertised wire projection: break cyclic $refs, bound nesting
depth, and drop unreachable $defs. Canonical Zod contracts are untouched.
---------
Co-authored-by: Kaoru0822 <208281322+kaoru0822-kitauji@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: sx4im <sx4im@users.noreply.github.com>
Co-authored-by: N0zoM1z0 <1705004398@qq.com>