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.
Install
npx skills add davila7/claude-code-templates --skill agent-tool-buildernpx skills add davila7/claude-code-templates --skill agent-tool-builder -a claude-code -gnpx skills add davila7/claude-code-templates --skill agent-tool-builder -a codex -ggemini skills install https://github.com/davila7/claude-code-templates.git --path cli-tool/components/skills/ai-research/agent-tool-buildergh skill install davila7/claude-code-templates agent-tool-buildergit clone --depth 1 https://github.com/davila7/claude-code-templates /tmp/davila7__claude-code-templates
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/davila7__claude-code-templates/cli-tool/components/skills/ai-research/agent-tool-builder ~/.claude/skills/agent-tool-builder # Claude Code
cp -R /tmp/davila7__claude-code-templates/cli-tool/components/skills/ai-research/agent-tool-builder ~/.agents/skills/agent-tool-builder # Codex, Cursor, Gemini CLI, Copilot, OpenCode