# Tool Design (agent skill)

> Tool Design is an agent skill (a SKILL.md file) from muratcankoylan/Agent-Skills-for-Context-Engineering. It should be used for the tool-interface layer of an agent system specifically: writing tool descriptions agents can route on, designing tool schemas and response… It works with Claude Code, Codex, Cursor and GitHub Copilot and has 18,216 GitHub stars across a repository of 6 listed skills.

This skill should be used for the tool-interface layer of an agent system specifically: writing tool descriptions agents can route on, designing tool schemas and response formats, naming conventions, actionable error recovery messages, MCP server design, tool-set consolidation, and deciding when to add or remove an individual tool. Use this when the unit of work is a single tool or a set of tools.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering |
| Skill path | skills/tool-design/SKILL.md |
| Skill name | tool-design |
| GitHub stars | 18,216 |
| Installs on skills.sh | 2 |
| License | MIT |
| Skills in repo | 6 |
| Plugin marketplace | context-engineering-marketplace |
| Official | no |
| Works with | Claude Code, Codex, Cursor, GitHub Copilot |
| Category | Design & frontend |
| Last commit | Oct 12, 2026 |

## When it triggers

- used for the tool-interface layer of an agent system specifically: writing tool descriptions agents can route on, designing tool schemas and response formats, naming conventions, actionable error recovery messages, MCP server design, tool-s
- Use this when the unit of work is a single tool or a set of tools.

## Add this skill

### Claude Code

```sh
/plugin marketplace add muratcankoylan/Agent-Skills-for-Context-Engineering
/plugin install context-engineering@context-engineering-marketplace
```

In the Claude apps, zip the skill folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

### ChatGPT / Codex

```sh
git clone --depth 1 https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering.git
cp -r Agent-Skills-for-Context-Engineering/skills/tool-design .agents/skills/tool-design   # repo; ~/.agents/skills for all projects
```

### Cursor

```sh
git clone --depth 1 https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering.git
cp -r Agent-Skills-for-Context-Engineering/skills/tool-design .cursor/skills/tool-design   # project; ~/.cursor/skills for all projects
```

Sources (checked 2026-10-07): https://code.claude.com/docs/en/skills, https://support.claude.com/en/articles/12512180-using-skills-in-claude, https://learn.chatgpt.com/docs/build-skills, https://cursor.com/docs/context/skills

skills.sh listing: https://www.skills.sh/muratcankoylan/Agent-Skills-for-Context-Engineering/tool-design

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Canonical page: https://appsgit.com/skills/muratcankoylan-tool-design
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