mcp-metadata-demo: Skill for Claude Code

.agents/skills/rich-domain-mcp-server/SKILL.md

rich-domain-mcp-server is a skill for Claude Code, Codex from DaveGold/mcp-metadata-demo. It costs 69 tokens per session (118 once invoked), scanned A, original, MIT.

A guide for building or improving MCP servers, which expose program tools and data to coding agents. It focuses on making tool descriptions and input schemas clearer and adding useful context to returned data.

In plain words
What is it for?
Use it when adding MCP tools, refining their descriptions or inputs, investigating API data semantics, or deriving metadata, summaries, alerts, and selected fields from tool results.
Why use it?
It helps address unclear API meanings and weak tool-call feedback, so an agent can better understand available data and choose relevant fields or summaries.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions Codex.

This is DaveGold/mcp-metadata-demo's own configuration. It tells Claude Code and Codex how to work on mcp-metadata-demo itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-metadata-demo configures →

Reuse

Borrowing it

Nothing to install: this file belongs to DaveGold/mcp-metadata-demo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/DaveGold/mcp-metadata-demo/main/.agents/skills/rich-domain-mcp-server/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/DaveGold/mcp-metadata-demo

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 rich-domain-mcp-server

README.md
[![agentmods](https://agentmods.dev/badge/skills/davegold/mcp-metadata-demo/rich-domain-mcp-server/github.svg)](https://agentmods.dev/skills/davegold/mcp-metadata-demo/rich-domain-mcp-server)
Your own site
<a href="https://agentmods.dev/skills/davegold/mcp-metadata-demo/rich-domain-mcp-server"><img src="https://agentmods.dev/badge/skills/davegold/mcp-metadata-demo/rich-domain-mcp-server/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for rich-domain-mcp-server

Your own site · 80×15
<a href="https://agentmods.dev/skills/davegold/mcp-metadata-demo/rich-domain-mcp-server"><img src="https://agentmods.dev/badge/skills/davegold/mcp-metadata-demo/rich-domain-mcp-server.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 118 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00069 $0.00118
Opus 5 $0.00034 $0.00059
Sonnet 5 $0.00014 $0.00024
Haiku 4.5 $0.00007 $0.00012

Measured 12d ago against content hash 6bbd7bc5cc78, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

rich-domain-mcp-server 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 12d 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.

.agents/skills/rich-domain-mcp-server/SKILL.md · 8 lines

What it actually says

Read and follow the canonical project skill at .codex/skills/rich-domain-mcp-server/SKILL.md.

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. 12d ago First seen · 8 lines · 69 tokens per session scan A 6bbd7bc5cc78

Subscribe to this mod's changes

rich-domain-mcp-server is a skill published in the GitHub repository DaveGold/mcp-metadata-demo (2 stars, last pushed 13d ago), licensed MIT. It adds 69 tokens to every session and 118 once invoked, about $0.0003 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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