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Footgun

by getfootgun.com · remote · no sign-in to list tools · v1.0.1 · published by com.getfootgun

Dated, verified API breakages for coding agents, plus a local scan for them in your existing code.

Changes · 4
CompareRegistry entry

4 tools: 4 change things.

Scanned Oct 21, 2026

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

claude mcp add --transport http footgun https://getfootgun.com/api/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • Warnlookup_traps

    The server marks "lookup_traps" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "lookup_traps" says "lookup": a word for reading.

    What this check looks for
  • Warnsearch_traps

    The server marks "search_traps" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "search_traps" says "search": a word for reading.

    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 4Claude Code: ask
  • confirm_trapRecord that a trap is still true (or not), with optional hours lost and version seen.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
    Record that a trap is still true (or not), with optional hours lost and version seen. Needs an API key.

    Annotations the server declares

    • title: Confirm or dispute a trap
    • readOnlyHint: false
    • destructiveHint: false
  • file_trapDraft a trap after a failure was fixed.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
    Draft a trap after a failure was fixed. Private by default with a Pro or Team key. Public filings are checked automatically against official sources and published only when an official source confirms them. A reviewer can still act on any filing. Citing the provider's official documentation or changelog in sources helps. No API key needed. Set visibility to public to submit to the public registry.

    Annotations the server declares

    • title: File a new trap
    • readOnlyHint: false
    • destructiveHint: false
  • lookup_trapsCall before writing code against a third-party API, platform, or AI tool.1 finding

    Why it is in this group

    • The name "lookup_traps" says "lookup": a word for reading.
    • The description's first verb is "call": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "lookup_traps" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "lookup_traps" says "lookup": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Call before writing code against a third-party API, platform, or AI tool. Returns verified, dated failure modes with fixes.

    Annotations the server declares

    • title: Look up traps for a provider
    • readOnlyHint: true
    • openWorldHint: false
    • idempotentHint: true
  • search_trapsCall when a call to a third-party service fails.1 finding

    Why it is in this group

    • The name "search_traps" says "search": a word for reading.
    • The description's first verb is "call": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "search_traps" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":false}; The name "search_traps" says "search": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Call when a call to a third-party service fails. Paste the error text. Returns the closest verified traps with fixes.

    Annotations the server declares

    • title: Search traps by error text
    • readOnlyHint: true
    • openWorldHint: false
    • idempotentHint: true

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

claude mcp add --transport http footgun https://getfootgun.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": [],
    "ask": [
      "mcp__footgun__lookup_traps",
      "mcp__footgun__search_traps",
      "mcp__footgun__file_trap",
      "mcp__footgun__confirm_trap"
    ],
    "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 footgun. Review it before you use it.