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Shiritori Dictionary (Japanese)

by omikuji.dev · remote · no sign-in to list tools · v1.0.0 · published by dev.omikuji

Play Japanese shiritori with a 90,000-word dictionary: check moves, suggest next words.

Changes · 3
CompareRegistry entry

3 tools: 3 change things.

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 shiritori https://shiritori.omikuji.dev/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncheck_move

    The server marks "check_move" 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 "check_move" says "move": 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 3Claude Code: ask
  • check_moveCheck whether the next word correctly follows the previous word in shiritori: it must start with the previous word's last kana, it loses if it ends in ん or was already used.1 finding

    Why it is in this group

    • The name "check_move" says "move": 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 "check_move" 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 "check_move" says "move": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Check whether the next word correctly follows the previous word in shiritori: it must start with the previous word's last kana, it loses if it ends in ん or was already used. Also tells whether each word is in the dictionary and what the next word must start with.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Check a shiritori move
  • check_wordLook up a word: is it in the dictionary, its reading, its first and last kana under shiritori rules (ー and small kana handled), whether it ends in ん, and which kana the next word m…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.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Look up a word: is it in the dictionary, its reading, its first and last kana under shiritori rules (ー and small kana handled), whether it ends in ん, and which kana the next word must start with.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • title: Check a word
  • suggest_nextPick random words that can follow the previous word (or start with a given kana), excluding words already used and, by default, words ending in ん.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.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Pick random words that can follow the previous word (or start with a given kana), excluding words already used and, by default, words ending in ん. pool "everyday" (default) uses hand-picked everyday words, "common" adds common dictionary words, "all" uses the whole dictionary.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
    • title: Suggest next words

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 shiritori https://shiritori.omikuji.dev/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__shiritori__check_move",
      "mcp__shiritori__suggest_next",
      "mcp__shiritori__check_word"
    ],
    "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 shiritori. Review it before you use it.