JustHandled Labs
// agent-native

Tool Schema Linter

Lint the function-calling tool definitions your agent exposes, so it picks the right tool instead of the wrong one or none.

What it flags

How to run

Point it at your tool-definition JSON or pipe it in. Read-only.

Good to know

This is heuristic; the unsafe-tool rule is advisory. It is distinct from REST API tooling: this targets function-calling definitions.

// choose with context

Is Tool Schema Linter the right skill?

Best fit

Lints function-calling tool definitions for missing descriptions, parameters with no type, overlapping or near-duplicate tools, too many tools for reliable selection, unsafe tools exposed without a guard, and unbounded free-form parameters. Read-only.

It returns

Lints function-calling tool definitions for missing descriptions, parameters with no type, overlapping or near-duplicate tools, too many tools for reliable selection, unsafe tools exposed without a guard,….

Do not use it as

Do not treat a successful run as proof beyond the supplied files, declared scope, and evidence the skill actually checked.

Compatibility, access, version, and licence

Reads or accesses
Only the files or context you deliberately provide; review the listing before granting additional access.
Compatibility
Agents that read the open SKILL.md format. Verify runtime and service requirements at the purchase or install destination.
Version
Verify the current package version at the linked destination.
Licence
Review the package licence and seller terms at the linked destination.

What happens next

The Agensi listing opens at the current offer. Complete purchase there, inspect SKILL.md and its bundled files, then add the complete folder to your agent.

Questions

Who is this for?

Anyone building agents, MCP servers, or function-calling apps.

Does it change anything?

No. Read-only. It flags issues for you to fix.

Help your agent pick the right tool.

Current price and purchase option are shown on Agensi. Instant download. Works with any agent that reads SKILL.md.

Get the Tool Schema Linter on Agensi