When an agent calls the wrong tool or passes garbage arguments, the instinct is to blame the model. Far more often, the tool definition is the problem: a vague description, an enum left as a free-string, a required field marked optional. This skill generates tool/function schemas that are written for the model, so correct calls are easy and invalid ones are impossible.
Tool Definition Generator is a community-contributed Claude Code skill in the scaffolders sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/tool-definition-generator/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when wiring functions into an agent's tool-calling loop.
The Tool Definition Generator Claude Code skill is built for developers, power users, and teams automating repetitive workflows and improving developer experience. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 146,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/tool-definition-generator curl -L https://claudskills.com/skills/tool-definition-generator/SKILL.md \ -o ~/.claude/skills/tool-definition-generator/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/tool-definition-generator/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/tool-definition-generator/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\tool-definition-generator\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
SKILL.md from the source repository to ~/.claude/skills/tool-definition-generator/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Tool Definition Generator is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Dev Tools category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{tool-definition-generator-2026,
author = {imtiazrayhan},
title = {Tool Definition Generator [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/tool-definition-generator/}
}Grade A · scanned 2026-07-06 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
Browse all Dev Tools skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.