missing-description

A skill definition with its description field omitted.

In plain words
What is it for?
It is for testing missing-description validation and fallback behavior.
Why use it?
It helps show how a system handles incomplete skill metadata.

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/avids2/memorix/missing-description
Any agent
npx skills add AVIDS2/memorix --skill missing-description
Clone the repo
git clone --depth 1 https://github.com/AVIDS2/memorix

Made for: Claude Code, Codex.

Per session 2 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 18 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00018
Opus 5 $0.00001 $0.00009
Sonnet 5 $0.00000 $0.00004
Haiku 4.5 $0.00000 $0.00002

Measured 2d ago against content hash ac54cca8108c, 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 2d 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

This is a copy

100% identical to missing-description — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

packages/memcode/test/fixtures/skills/missing-description/SKILL.md · 8 lines

What it actually says

Missing Description

This skill has no description field.

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. 2d ago First seen · 8 lines · 2 tokens per session scan A ac54cca8108c

Subscribe to this mod's changes

missing-description is a skill published in the GitHub repository AVIDS2/memorix (705 stars, last pushed 2d ago), licensed Apache-2.0. It adds 2 tokens to every session and 18 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to missing-description, differing in 0 lines, and is treated as a copy.

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