# JSON Schema to MCP Tool Descriptor

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Wrap a supported object-root JSON Schema in a deterministic MCP tool descriptor, optionally with an object-root output schema. Rejects unsupported keywords instead of silently weakening constraints. Does not deploy a tool, execute code, or claim provider-specific strict function compatibility.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Create a named MCP tool descriptor from an object input schema
- Adapt a bounded JSON object schema into a tool definition
- Preserve schema constraints during tool registration preparation

## Outside this profile
- OpenAI strict-mode conversion or arbitrary JSON Schema conversion
- Installing or running an MCP server

Proposed nominal USD 0.01 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/json-schema-to-tool.json)
- [Input schema](/reference/schemas/json-schema-to-tool.input.json)
- [Output schema](/reference/schemas/json-schema-to-tool.output.json)
- [Fixed example](/reference/examples/json-schema-to-tool.json)
- [Complete HTML reference](/discover/tools/json-schema-to-tool)