tool-design SKILL.md skillA
tool-design from nahid-sparktales/agent-dispatcher is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nahid-sparktales/agent-dispatcher/tool-design@git:20260919.a0d4f55Pins git:20260919.a0d4f55 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nahid-sparktales/agent-dispatcher
- Path
skills/ai/tool-design/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260919.a0d4f55, committed Sep 19, 2026
- Size
- 7,156 bytes
- Repository stars
- 58
- License
- MIT
Design the tools a model calls — names, parameter shapes, what a result returns, and error text written as an instruction the model can act on. Use when adding or reshaping a tool or function an LLM invokes, when an agent keeps calling the wrong tool or passing malformed arguments, or when reviewing a tool surface someone else defined. Not for building the MCP server that hosts the tools (mcp-design), not for forcing a model's final answer into a schema (structured-output), and not for prompt…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Tool design A tool definition is a prompt. The model never sees your implementation — it sees the name, the description, the parameter schema, and whatever came back last time. Most "the model is bad at using tools" is a tool that told the model the wrong thing. ## When this fires Adding a tool to an agent, changing an existing tool's parameters or return value, or diagnosing an agent that picks the wrong tool, passes bad arguments, loops, or stalls after a call. It does not fire for an internal function no model ever invokes. ## Procedure 1. **Start from the task, not the API.** List the things the agent must accomplish, then define one tool per accomplishment. A thin one-to-one wrapper over an existing HTTP API pushes the orchestration into the model, which pays for it in extra turns and wrong guesses. Prefer one `schedule_meeting` over `list_calendars` + `get_availability` + `create_event` unless the agent genuinely needs the intermediate steps. 2. **Count the tools.** A large, overlapping surface is the main cause of wrong-tool selection. If two tools could plausibly answer the same request, either merge them or make each description …
Read the whole file at its exact version.
How to install
mdr add nahid-sparktales/agent-dispatcher/tool-design@sha256:3000f57464a3166eThe line at the top of this page pins the label git:20260919.a0d4f55, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_uknmmb54misisyii)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 19, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7156 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nahid-sparktales/agent-dispatcher · 58 stars · license MIT · pushed 2026-10-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_uknmmb54misisyii GET https://markdownregistry.com/api/v1/resolve?ref=nahid-sparktales/agent-dispatcher/tool-design GET https://markdownregistry.com/api/v1/blob/3000f57464a3166ea797b412aae380da386e5d4b9eea01c38845a86affc504b2
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from nahid-sparktales/agent-dispatcher
Every file in nahid-sparktales/agent-dispatcher