agent-tool-builder

agent-tool-builder is an open-source workflow skill for Claude Code and compatible agents, published by sickn33. Its author describes it as: “Tools are how AI agents interact with the world. A well-designed tool is the difference between an agent that works and one that hallucinates, fails silently, or costs 10x more tokens than necessary. This skill covers…”. The project has 45k stars on GitHub and is available under the MIT license. Add it to your setup with `/plugin marketplace add sickn33/agentic-awesome-skills`.

What agent-tool-builder does

Tools are how AI agents interact with the world. A well-designed tool is the difference between an agent that works and one that hallucinates, fails silently, or costs 10x more tokens than necessary.

Installation

Add agent-tool-builder to your agent with:

/plugin marketplace add sickn33/agentic-awesome-skills

Always review a skill's source before installing it. This command comes from the skill's public repository; the linked repo is the source of truth for exact setup steps.

What's inside

The SKILL.md for agent-tool-builder is organised into these sections:

• Principles
• Capabilities
• Scope
• Tooling
• Standards
• Frameworks
• Patterns
• Tool Schema Design
• 1. Detailed Descriptions (Most Important)
• 2. Parameter Descriptions
• 3. Use Enums When Possible
• 4. Required vs Optional

When to use it

Reach for agent-tool-builder when you want workflow help from your agent without writing the same instructions every session. Load the skill and the agent picks it up automatically for relevant tasks.

Strengths

• Clear MIT license — safe to read and adapt
• Ships in sickn33/agentic-awesome-skills, an established project with 45,044 GitHub stars
• Actively maintained (recent commits)

Topics

Frequently asked questions

What does agent-tool-builder do?

Tools are how AI agents interact with the world. A well-designed tool is the difference between an agent that works and one that hallucinates, fails silently, or costs 10x more tokens than necessary. This skill covers tool design from schema to error handling.

How do I install agent-tool-builder?

Run /plugin marketplace add sickn33/agentic-awesome-skills in your agent, then reload your skills. Review the source at https://github.com/sickn33/agentic-awesome-skills before installing.

Is agent-tool-builder free to use?

Yes. agent-tool-builder is free and open source under the MIT license, so you can read, run, and adapt it within that license's terms.

Where does agent-tool-builder come from?

agent-tool-builder ships inside sickn33/agentic-awesome-skills, a repository that contains 66 catalogued skills in total. The repository's 45,044 GitHub stars apply to that whole collection, not to this skill on its own.