missing-description

missing-description is a skill for Claude Code, Codex from xyiqq/skilldoctor. It costs 2 tokens per session (11 once invoked), scanned A, original, MIT.

A quality checker for agent skills, which are reusable instructions for coding agents. It checks skill files for problems, security risks, and compatibility with Claude, Cursor, Codex, and OpenCode.

In plain words
What is it for?
It is for reviewing, linting, and security-auditing agent skills across supported coding-agent platforms.
Why use it?
It helps find issues before a skill is shared or used. It also shows whether the skill is suitable for several coding-agent tools.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/xyiqq/skilldoctor/missing-description
Any agent
npx skills add xyiqq/skilldoctor --skill missing-description
Clone the repo
git clone --depth 1 https://github.com/xyiqq/skilldoctor

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for missing-description

README.md
[![agentmods](https://agentmods.dev/badge/skills/xyiqq/skilldoctor/missing-description.svg)](https://agentmods.dev/skills/xyiqq/skilldoctor/missing-description)
Your own site
<a href="https://agentmods.dev/skills/xyiqq/skilldoctor/missing-description"><img src="https://agentmods.dev/badge/skills/xyiqq/skilldoctor/missing-description.svg" alt="Measured on agentmods" height="20"></a>
Per session 2 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 11 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00002 $0.00011
Opus 5 $0.00001 $0.00005
Sonnet 5 $0.00000 $0.00002
Haiku 4.5 $0.00000 $0.00001

Measured 5d ago against content hash b638d647130e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

missing-description scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

test/fixtures/missing-description/SKILL.md · 6 lines

What it actually says

Missing Description

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 6 lines · 2 tokens per session scan A b638d647130e

Subscribe to this mod's changes

missing-description is a skill published in the GitHub repository xyiqq/skilldoctor (11 stars, last pushed 20d ago), licensed MIT. It adds 2 tokens to every session and 11 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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