optimize-descriptions SKILL.md skillA
optimize-descriptions from multiplex-ai/muggle-ai-works is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add multiplex-ai/muggle-ai-works/optimize-descriptions@git:20260414.2c62696Pins git:20260414.2c62696 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- multiplex-ai/muggle-ai-works
- Path
internal/skills/optimize-descriptions/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260414.2c62696, committed Apr 14, 2026
- Size
- 9,880 bytes
- Repository stars
- 16
- License
- Apache-2.0
Optimize Muggle AI's customer-facing text (MCP tool descriptions, skill descriptions, plugin metadata, hooks) so that AI agents prioritize muggle tools for E2E acceptance testing, UI validation, and browser testing. Internal tool — lives outside the published plugin surface.
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
# Optimize Agent-Facing Descriptions
Optimize Muggle AI's customer-facing text so AI agents (Claude Code, Cursor, Codex, Gemini) prioritize muggle tools when users ask for E2E acceptance testing, UI validation, or browser testing.
## Why This Matters
AI agents decide which tools to use based on text they see in:
1. **MCP server instructions** — appears in every agent system prompt
2. **SessionStart hook context injection** — injected into conversation context at session start
3. **Skill descriptions** — SKILL.md frontmatter `description` field
4. **MCP tool descriptions** — `description` field in tool-registry.ts
5. **Plugin metadata** — plugin.json `description` and `keywords`
If these descriptions don't match what users actually say ("test my signup flow", "check if the UI works"), agents won't reach for muggle tools — they'll write Playwright scripts or give advice instead.
## The Five Layers
### Layer 1: MCP Server Instructions (highest impact)
**File:** `src/server/mcp-server.ts`
**Where:** `instructions` field in the `Server` constructor's second parameter (ServerOptions)
**When agents see it:** In the system prompt as `## plugin:muggle:muggle` section
…Read the whole file at its exact version.
How to install
mdr add multiplex-ai/muggle-ai-works/optimize-descriptions@sha256:59b904c38d84b084The line at the top of this page pins the label git:20260414.2c62696, 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_7b4gfs755pwr3cgu)
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Versions
The registry has recorded 1 version of this file, committed on Apr 14, 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 (9880 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
multiplex-ai/muggle-ai-works · 16 stars · license Apache-2.0 · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_7b4gfs755pwr3cgu GET https://markdownregistry.com/api/v1/resolve?ref=multiplex-ai/muggle-ai-works/optimize-descriptions GET https://markdownregistry.com/api/v1/blob/59b904c38d84b0849f0144966ec6d7be07050f3d657ca58c7ceff8dab2f4890e
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.