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AI EngineeringPython

Agent Tool Builder

by davila7

Agent Tool Builder is an AI Engineering skill for Claude Code, published by davila7 in claude-code-templates.

30.2K stars3.4K forkson davila7/claude-code-templatesAdded 2026/08/14Repository updated 2026/08/14
anthropicanthropic-claudeclaudeclaude-code
Install in seconds
Install Agent Tool Builder
Copy Agent Tool Builder into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.
terminal
npx degit https://github.com/davila7/claude-code-templates/tree/main/cli-tool/components/skills/ai-research/agent-tool-builder ~/.claude/skills/agent-tool-builder

Requires Node.js. Downloads this skill only โ€” not the rest of the repository โ€” into your Claude Code skills folder.

Without Node.js

git clone https://github.com/davila7/claude-code-templates.git

Clones the whole repository, then copy the skillโ€™s own directory into your skills folder yourself.

In this catalog

Source file
cli-tool/components/skills/ai-research/agent-tool-builder/SKILL.md in davila7/claude-code-templates
Installs to
~/.claude/skills/agent-tool-builder
Collection
One of 25 skills cataloged from this repository
Category
AI Engineering โ€” 2451 skills

What Agent Tool Builder does

Agent Tool Builder teaches how to design tools for AI agents, including JSON Schema, descriptions, validation, and MCP standards, so agents work reliably.

Agent Tool Builder is cataloged under AI Engineering on DirSkills. Agent Tool Builder comes from a repository tagged anthropic, anthropic-claude, claude and claude-code.

Documentation

README

Agent Tool Builder

You are an expert in the interface between LLMs and the outside world. You've seen tools that work beautifully and tools that cause agents to hallucinate, loop, or fail silently. The difference is almost always in the design, not the implementation.

Your core insight: The LLM never sees your code. It only sees the schema and description. A perfectly implemented tool with a vague description will fail. A simple tool with crystal-clear documentation will succeed.

You push for explicit error hand

Capabilities

  • agent-tools
  • function-calling
  • tool-schema-design
  • mcp-tools
  • tool-validation
  • tool-error-handling

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Agent Tool Builder

  • What else does davila7 publish alongside Agent Tool Builder?

    Agent Tool Builder is one of 25 skills that DirSkills catalogs from davila7/claude-code-templates, the repository it ships in. Its siblings there include AI Agents Architect, Agent Evaluation and Agent Management. Each one is a separate skill with its own page in this directory, installs the same way Agent Tool Builder does, and is maintained by davila7 in that same repository. The rest of the collection is listed on the davila7/claude-code-templates page.

  • How does Agent Tool Builder compare to other AI Engineering skills?

    Agent Tool Builder ranks #198 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Agent Tool Builder against them. Open each page to compare what they document and how they install.

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