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io.github.elyngved/failmodes

by elyngved · remote · local (npm) · no sign-in to list tools · v0.1.0 · published by GitHub user elyngved

MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes

Read only
CompareRegistry entry

4 tools: 4 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http failmodes https://www.failmodes.com/api/mcp

Tools

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

4 tools

Only reads 4Claude Code: allow
  • get_failure_modeRetrieve the full structured record for a single failure mode by its ID slug (e.g.No findings

    Why it is in this group

    • The name "get_failure_mode" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve the full structured record for a single failure mode by its ID slug (e.g. 'citation-hallucination', 'sycophancy').
  • list_categoriesList all taxonomy categories with their IDs, names, descriptions, and mode counts.No findings

    Why it is in this group

    • The name "list_categories" says "list": a word for reading.
    Description, as the server wrote it
    List all taxonomy categories with their IDs, names, descriptions, and mode counts.
  • list_modesList failure modes, optionally filtered to a single category by category ID.No findings

    Why it is in this group

    • The name "list_modes" says "list": a word for reading.
    Description, as the server wrote it
    List failure modes, optionally filtered to a single category by category ID.
  • search_failure_modesSearch the Fail Modes taxonomy by symptom text or keyword phrase.No findings

    Why it is in this group

    • The name "search_failure_modes" says "search": a word for reading.
    Description, as the server wrote it
    Search the Fail Modes taxonomy by symptom text or keyword phrase. Returns ranked matches with id, name, category, and matched context.

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 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http failmodes https://www.failmodes.com/api/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__failmodes__search_failure_modes",
      "mcp__failmodes__get_failure_mode",
      "mcp__failmodes__list_categories",
      "mcp__failmodes__list_modes"
    ],
    "ask": [],
    "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 failmodes. Review it before you use it.