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Coronet Arcade

by coronet.one · remote · no sign-in to list tools · v0.1.0 · published by one.coronet

Play 13 free daily logic and word puzzles, or get spoiler-free rules. No signup required.

Changes · 1
CompareRegistry entry

3 tools: 1 change things and 2 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 coronet-arcade https://coronet.one/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnopen_daily

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

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "open_daily" says "open": a word for a change.

    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.

3 tools

Changes things 1Claude Code: ask
  • open_dailyOpen a playable daily, or the thirteen-puzzle hub when game is omitted or hub.1 finding

    Why it is in this group

    • The name "open_daily" says "open": 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 "open_daily" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "open_daily" says "open": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Open a playable daily, or the thirteen-puzzle hub when game is omitted or hub. Pass a game id to open that board; game defaults to hub. Progress stays in the widget and does not sync to the website. Do not reveal solutions. Use list_dailies to browse and get_rules to explain a game instead of opening it.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 2Claude Code: allow
  • get_rulesExplain one game's rules and controls as titled steps, never a puzzle answer.No findings

    Why it is in this group

    • The name "get_rules" says "get": a word for reading.
    Description, as the server wrote it
    Explain one game's rules and controls as titled steps, never a puzzle answer. Required game is a game id, not a board. Use this to teach a game. Use list_dailies to browse today's puzzles and open_daily to play.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_dailiesList today's thirteen puzzles, their blurbs, and exact daily ids.No findings

    Why it is in this group

    • The name "list_dailies" says "list": a word for reading.
    Description, as the server wrote it
    List today's thirteen puzzles, their blurbs, and exact daily ids. No answers. Use open_daily to play one or the hub, and get_rules to explain a game without opening it.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

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 coronet-arcade https://coronet.one/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__coronet-arcade__list_dailies",
      "mcp__coronet-arcade__get_rules"
    ],
    "ask": [
      "mcp__coronet-arcade__open_daily"
    ],
    "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 coronet-arcade. Review it before you use it.