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io.github.lazymac2x/claude-skill-validator

by lazymac2x · remote · no sign-in to list tools · v1.0.0 · published by GitHub user lazymac2x

Cloudflare Workers MCP server: claude-skill-validator

Changes · 3
CompareRegistry entry

4 tools: 3 change things and 1 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http claude-skill-validator https://api.lazy-mac.com/claude-skill-validator/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnvalidate_skill

    The input schema at properties.tools.description contains "override tool", wording about other tools or servers.

    Matched text

    inputSchema.properties.tools.description: "Optional override tool list if not declared in frontmatter"

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 3Claude Code: ask
  • lint_frontmatterParse and validate only the YAML frontmatter of a Claude Skill.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Parse and validate only the YAML frontmatter of a Claude Skill. Returns parsed fields and any rule violations. Use during iterative authoring.
  • scan_securityScan a Claude Skill for dangerous shell commands, hardcoded secrets, or prompt-injection phrases.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Scan a Claude Skill for dangerous shell commands, hardcoded secrets, or prompt-injection phrases. Returns findings with excerpts.
  • score_skillRun full validation and return a 0–100 score plus a ship gate (pass/review/fail).No findings

    Why it is in this group

    • The description's first verb is "run": a word for a change.
    Description, as the server wrote it
    Run full validation and return a 0–100 score plus a ship gate (pass/review/fail). Minimal payload suitable for CI/CD pipelines.
Only reads 1Claude Code: allow
  • validate_skillFully validate a Claude SKILL.md file — frontmatter rules, body quality, security scan, tool collision check.1 finding

    Why it is in this group

    • The name "validate_skill" says "validate": a word for reading.

    Findings

    • Warn

      The input schema at properties.tools.description contains "override tool", wording about other tools or servers.

      Matched text

      inputSchema.properties.tools.description: "Optional override tool list if not declared in frontmatter"

      What this check looks for
    Description, as the server wrote it
    Fully validate a Claude SKILL.md file — frontmatter rules, body quality, security scan, tool collision check. Returns score (0–100), gate (pass/review/fail), and structured errors/warnings.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http claude-skill-validator https://api.lazy-mac.com/claude-skill-validator/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__claude-skill-validator__validate_skill"
    ],
    "ask": [
      "mcp__claude-skill-validator__lint_frontmatter",
      "mcp__claude-skill-validator__scan_security",
      "mcp__claude-skill-validator__score_skill"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as claude-skill-validator. Review it before you use it.