Custom Tool Contract
generic JSON Schema gate · local only

Define / validate / discover

Make the contract
earn its line.

A one-line tool is only useful when its inputs are explicit. Compile the schema, test representative args, and keep runtime claims outside the proof.

Tool definition
loading runtime…

Manifest JSON

Representative args

Generic JSON Schema evidence only. It does not prove execution, permissions, side-effect safety, or pi/Codex extension compatibility.

Waiting for a contract

Load the sample to compile a manifest and validate its args.

Manifest schema
name, description, parameters
Sample args
compiled parameter schema
Parameters
properties in schema
Required
fields required at call time
Discoverable command preview
waiting for a valid manifest
The completed audit will distinguish schema shape from argument validity.
Interpretation boundary
Schema validity is a contract checkpoint, not proof that a tool executes, has safe permissions, or matches any named extension's runtime API.

Shape before execution

A tool name and description make discovery readable. A JSON Schema makes its input boundary executable and testable.

Pass is not permission

Even valid args can trigger unsafe effects. Authorization, side-effect review, and runtime integration remain separate gates.

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