What validation library does it use?

The skill defaults to using Zod for schema creation, ensuring all tool inputs are strictly typed and validated before execution.

Does it automate the registration process?

Yes, it provides instructions to update the server's main index file and the local state JSON to ensure the tool is recognized by the application.

How does this skill handle data safety?

It uses a classification system (Query vs. Destructive) to apply metadata hints like 'readOnlyHint' and 'destructiveHint', ensuring the AI handles sensitive operations appropriately.

Does it support UI components?

Yes, the skill includes a specific 'Widget Tool Pattern' that helps register tools designed to render HTML-based UI content in the chat interface.

What is an MCP tool in this context?

An MCP (Model Context Protocol) tool is a specialized capability that allows a ChatGPT-based application to interact with external data, APIs, or UI components.

ChatGPT App MCP Tool Builder

Name: ChatGPT App MCP Tool Builder
Author: hollaugo

byhollaugo

•

API開発

Streamlines the creation and integration of Model Context Protocol (MCP) tools into ChatGPT applications.

This skill provides a comprehensive, step-by-step workflow for developing and registering new MCP tools within the ChatGPT App framework. It guides developers through tool classification, Zod schema design, and automated code generation for tool handlers and registration. By standardizing how tools are defined—including metadata for read-only hints, destructive actions, and UI widgets—it ensures that custom extensions are robust, type-safe, and correctly interpreted by AI models.

主な機能

01Automated Zod schema generation for robust input validation

02Integrated support for UI Widget tools with output templates

03Streamlined tool registration and metadata annotation

04Automatic state management updates for the ChatGPT App ecosystem

0520 GitHub stars

06Guided tool classification for Query, Mutation, and Destructive actions

ユースケース

01Creating interactive UI widgets for data visualization within the chat

02Adding external API integrations to a custom ChatGPT application

03Developing secure database mutation tools with proper safety hints

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hollaugo/tutorials add-tool

For use in Claude.ai and ChatGPT

Download Skill