---
title: "Tool Design for Agents - Air Market"
description: "An agent picks the wrong tool mostly because the tools were described badly. This is about that layer: what each tool is called, what it takes, what it gives back, and what it says when it fails. Rea…"
canonical: "https://airmarket.ai/app/tool-design"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Tool Design for Agents

Skill by [Muratcan Koylan](/@muratcankoylan)

# Tool Design for Agents

Write tools an agent picks correctly the first time

## What this does

An agent picks the wrong tool mostly because the tools were described badly. This is about that layer: what each tool is called, what it takes, what it gives back, and what it says when it fails. Reach for it when your agent has the right tool available and still does not use it.

### Top 3 things it does for you

- Write a tool description an agent can route on
- Design a tool's inputs and what it returns
- Write error messages an agent can act on

## Information

**Tool Design for Agents at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Muratcan Koylan](/@muratcankoylan) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 55 KB |
| Licence | MIT |
| Repository | [muratcankoylan/Agent-Skills-for-Context-Engineering](https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering/tree/c578e85e40fe2bda7c1fec91ff64cf5285434934/skills/tool-design) |
| GitHub stars | 17,811 (as of Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Tool Design for Agents and flagged nothing. AIR's verdict: **safe**.

**What Tool Design for Agents's check was run against**

|  |  |
| --- | --- |
| Commit | c578e85e40fe2bda7c1fec91ff64cf5285434934 |
| Content hash | e160cd01c68440d4ac689b5b7949a86d0ab86f02d649a36d1cf861ba8ab0af6c |
| Files read | [Browse the files at this exact commit](https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering/blob/c578e85e40fe2bda7c1fec91ff64cf5285434934/skills/tool-design/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Tool Design for Agents](/security/tool-design)

## About Tool Design for Agents

This is the tool-interface layer specifically: writing descriptions an agent can route on, designing schemas and response formats, and settling naming conventions.

It also covers what happens when a call fails - error messages that point at a recovery - along with MCP server design, consolidating an overgrown tool set, and deciding when an individual tool should be added or removed.

The unit of work is one tool or a set of them. Project shape, pipeline architecture, and task-model fit go to project-development; whether to introduce sub-agents goes to multi-agent-patterns.

## What's inside

- SKILL.md - instructions
- references/architectural_reduction.md - reference
- references/best_practices.md - reference
- scripts/description_generator.py - script

## Questions

### Is Tool Design for Agents safe to install?

AIR scanned this exact version of Tool Design for Agents and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit c578e85e40fe, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/tool-design.

### How do I install Tool Design for Agents?

Open https://airmarket.ai/app/tool-design on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering/tree/c578e85e40fe2bda7c1fec91ff64cf5285434934/skills/tool-design. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Muratcan Koylan](/@muratcankoylan)

---

Canonical URL: <https://airmarket.ai/app/tool-design>