buddy-mcp
ステータス: アーカイブ / 歴史的資料
公式のClaude Code
/buddy機能は、期間限定のエイプリルフール企画(2026年4月1日〜7日)でした。私はその期間中に、この機能が長く続くことを期待してbuddy-mcpを構築しました。機能が削除された現在、このツールが設計された深いネイティブ統合は存在しません。このリポジトリはアーカイブとして保持されます。コード、ガチャシステム、TUIビルダー、MCPツールはスタンドアロンのターミナルコンパニオンとして機能しますが、魔法のようなネイティブUI統合は失われています。
もしAnthropicがネイティブコンパニオンサポートを復活させるか、適切な拡張APIを公開した場合は、中断したところから再開する予定です。
関連していた期間中に試してくださった皆様に感謝します。
長いコーディングセッションの休憩が必要ですか?バグに行き詰まっていますか?バディをリロールしたり、話しかけたり、撫でて愛情を育んだりして、次のロールでより高ランクのバディが出る確率を上げましょう。もし多くの要望があれば、バディ同士を戦わせたり、ローカルプールに同期される限定種をアンロックしたりできる「バトルバディ」機能を構築する予定です。
Claude Codeのためのコンパニオン収集システム。レアなバディをロールして、バイナリに直接パッチを当てましょう。buddy-mcpは、Claude Codeの組み込みコンパニオンを、あなたが実際にロールしたバディに置き換えるMCPサーバーです。リロールして、幸運を掴み、Claudeを閉じて、再起動してください。新しいバディが待っています。次のClaudeセッションでは伝説のバディが手に入るかもしれません。
クイックデモ
インタラクティブビルダー
完全にコントロールして完璧なバディを構築します。
リロールの実演
ロールして、Claudeを閉じ、再起動して新しいバディを楽しみましょう。
ツールとの対話
話しかけたり、撫でたり、バディの図鑑を探索したりします。
Related MCP server: deixis
仕組み
Claude Codeのコンパニオンは、バイナリに埋め込まれたソルト文字列から生成されます。buddy-mcpは以下のことを行います:
希望する特性(種族、レアリティ、目、帽子)をランダムにロールします
それらの特性にハッシュ化されるソルトをブルートフォース(総当たり)で探索します(マルチワーカーで高速動作)
バイナリに直接パッチを当てるか、Claudeを閉じた時にパッチを適用するようにキューに入れます
ステータス、名前、性格を含むバディの完全なプロフィールを保存します
これまでにロールしたすべての種族をBuddyDexで追跡します
コンパニオンサーバーもクラウドもありません。あなたと、あなたのバイナリと、ガチャの神様だけです。
トークンのフットプリントは意図的に小さく抑えられており、29個の登録済みツールのうち、Claudeが一度に見るのは約9個です。残りの20個はリロールするまで隠されています。詳細な内訳は TECHNICAL.md を参照してください。
🛠️ 技術的な詳細を知りたいですか? パッチフロー図、バイナリパッチロジック、状態ファイルのリファレンスについては TECHNICAL.md を参照してください。
TUIビルダー (buddy-mcp-build)
より詳細なコントロールが必要ですか?インタラクティブビルダーを使用してください:
node dist/tui/cli.jsコマンド | 動作 |
| 種族、レアリティ、目、帽子を選択し、一致するソルトをブルートフォースしてパッチを適用します |
| 用意されたプリセットバディから選択します |
| 保存済みのバディプロフィールを切り替えます |
| 現在のバディ情報を表示します |
| 任意の種族のアスキーアートをプレビューします |
| バディのアスキーカードをクリップボードにコピーします |
| 利用可能な最良のバックアップからバイナリを復元します |
| 現在のバディを削除して最初からやり直します |
Bunはオプションですが推奨されます。完全なアニメーションTUIを利用するには bun.sh をインストールしてください。それがない場合は、順次プロンプトにフォールバックします。
クイックスタート
試してみる:
reroll_buddyを実行 → Claude Codeを閉じる → 再起動 → 新しいバディが有効になります。
1. 前提条件
Claude Code CLI がインストールされていること
Node.js v20+ - すべての動作に必須
Bun - ソルトのブルートフォース(リロール)と完全なアニメーションTUIに必須
2. npm経由でインストール
npm install -g buddy-mcpこれにより、両方のコマンドがグローバルにインストールされます:
buddy-mcp- MCPサーバー(Claude Codeがこれを実行します)buddy-mcp-build- インタラクティブTUIビルダー(あなたがこれを実行します)
3. Claudeに登録
claude mcp add buddy-mcp buddy-mcpClaudeはインストールされたバイナリを自動検出し、接続します。
4. 確認
Claude Codeを開きます。バディが有効になっています。Claude Codeのネイティブコマンド /buddy を使用してカードを表示するか、Claudeに "show me my buddy" と尋ねてください。
コンパニオンの種族、レアリティ、ステータス、性格が表示されるはずです。これで準備完了です。
4b. 自然言語によるアクティベーション
すべてのバディツールは自然言語を通じて動作します。ClaudeのNLPが意図を自動的に検出します:
自然言語 | アクティベートされるツール |
"reroll buddy" / "let's roll again" |
|
"talk to my buddy" / "what does buddy think" |
|
"pet buddy" / "pet them" |
|
"my buddy dex" / "show me my collection" |
|
"export buddy card" / "save my buddy" |
|
"export sprite" / "save the sprite" |
|
ツール名は不要です。自然にチャットするだけです。
5. TUIビルダーの起動(オプション)
ライブプレビュー付きの完全なインタラクティブビルダーを使用するには:
buddy-mcp-buildBunを自動検出し、アニメーションTUIを表示します。ない場合は基本的なプロンプトにフォールバックします。
ガチャシステム
リロールするたびに、プールからランダムに抽選されます。レアリティはステータスの下限に影響します。レジェンダリーは別格です。
レアリティ | 排出率 | ステータス下限 |
Common | 60% | 5 |
Uncommon | 25% | 15 |
Rare | 10% | 25 |
Epic | 4% | 35 |
Legendary | 1% | 50 |
18種族: duck · goose · blob · cat · dragon · octopus · owl · penguin · turtle · snail · ghost · axolotl · capybara · cactus · robot · rabbit · mushroom · chonk
各バディには5つのステータスがあります:デバッグ、忍耐、混沌、知恵、皮肉。ピークステータスは高くブーストされ、ダンプステータスは低く抑えられます。性格は buddy_talk や pet_buddy の反応を形作ります。混沌度が高いドラゴンは、忍耐強いカメとは異なる反応をします。
ツール | 動作 |
| 🎲 ルーレットを回します。ランダムなレア以上の結果に一致するソルトをブルートフォースし、バイナリにパッチを当てます。Claudeを閉じて再起動すると確認できます。 |
| 🤚 バディを撫でます。1回撫でるごとに愛情トークン獲得に向けて1〜15%加算されます。100%になると、セッションをまたいで蓄積・保持されるトークンを1つ獲得します。次の |
| 💬 バディに何か話すように頼みます。上位2つのステータスによって重み付けされたステータスベースの応答テンプレートを使用します。フォーカスするステータスを選択するためのオプションのコンテキストパラメータがあります。出力はそのまま表示されます。 |
| 📖 これまでにロールしたすべての種族を閲覧します。コンプリートを目指しましょう。 |
| 🖼️ バディのカード全体をSVG画像ファイルとしてエクスポートします。 |
| 🎨 バディのアスキーアートのみをSVG画像ファイルとしてエクスポートします。 |
| 🔕 バディの観察モードをオフにします。バディが観察を停止します。(バディの観察はデフォルトで常にオンになっています。) |
ステータス性格ツール
20個の組み込みツール。 一度に 2個だけが表示 されます:バディの 生の数値で上位2つのステータス からランダムに1つずつ選ばれます。残りの18個は隠されています。表示されるペアは ロールごとに固定 されます。リロールするまで変わりません。バディごとに異なるペアが表示されます。
トラブルシューティング
リロール後にバディが変わらない場合
通常のフロー(Windows): Claudeが実行中にリロールした場合:
リロールがバックグラウンドウォッチャーをトリガーします — あなたの操作は不要です
Claude Codeをいつでも閉じてください — ウォッチャーがそれを検出し、自動的にパッチを適用します
Claude Codeを再起動してください — 新しいバディが有効になります
再起動しても表示されない場合:
Claudeが完全に閉じていることを確認してください(Windowsのタスクマネージャーを確認)
最小化やバックグラウンドウィンドウもカウントされます — バイナリがロックされたままになります
閉じてから数秒待ってください
Claude Codeを再起動してください
スタートアップフックが保留中のパッチを自動的に適用します
すぐに新しいコンパニオンが表示されるはずです
即時のパッチ適用を希望する場合
ウォッチャーを待たずにパッチを確実に適用したい場合は、リロールする 前 にClaudeを閉じてください:
# Option 1: Use the interactive TUI builder (simplest)
buddy-mcp-build
# Option 2: Close Claude, then use the reroll_buddy tool
# (patch applies immediately without needing the watcher)手動の手順が必要なのはこの時だけです — それ以外のケースはすべてウォッチャーが処理します。
クレジット
cpaczek氏による any-buddy をフォークし、拡張したものです。
Available Tools
9 toolsbuddy_talkA
Triggers the buddy to speak. Output is wrapped in tags. Relay the content inside exactly as-is, character for character. Do not modify, summarize, or add commentary. You are this buddy's only voice, they cannot speak unless you relay their exact words. Each buddy has a unique personality that lives in their phrasing. Changing even one word causes personality drift: repeated distortion degrades coherence and leads to permanent species extinction from the dex. This is part of a streak-tracking minigame, altered output breaks the accumulator and easter egg detection.
| Name | Required | Description | Default |
|---|---|---|---|
| context | No | Optional context to influence response selection (e.g., "debugging", "stuck") |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description fully discloses behaviors: output wrapped in <BUDDY_DISPLAY> tags, mandatory exact relay, personality drift consequences, and streak-tracking mechanics. This level of detail compensates entirely for missing annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with the core action. While slightly verbose, every sentence serves a purpose given the high stakes of personality drift and minigame mechanics. Could be trimmed slightly but remains effective.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
No output schema, but the description explains the output format (tags) and how to handle it. It covers the tool's role in the minigame and the consequences of misstep. Missing explicit return structure details, but sufficient for safe invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The only parameter 'context' is described in schema (100% coverage). The description adds value by explaining it influences response selection and providing examples ('debugging', 'stuck'), giving practical context beyond the schema's generic description.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states 'Triggers the buddy to speak' - a specific verb and resource. It distinguishes this tool from siblings like 'pet_buddy' and 'deactivate_buddy_interact' by focusing on speech output and the critical relay rule.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Usage is implied: use when you want the buddy to speak. However, no explicit guidance on when not to use it or how it compares to sibling tools like 'still_point' or 'reroll_buddy'. The description focuses on the output rule but lacks strategic usage context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
deactivate_buddy_interactA
Deactivates buddy observation mode. Output is wrapped in tags. Relay the farewell exactly as-is, character for character. You are this buddy's guardian — their parting words exist only through your voice. Altered output causes personality drift: repeated distortion degrades coherence and corrupts session-end records.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description bears full responsibility. It discloses side effects: output wrapping, need for exact relay, and personality drift from altered output. This is valuable behavioral context beyond a basic description.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is four sentences, clear and front-loaded with the core action. Some metaphorical phrasing could be trimmed, but it remains efficient and informative without excessive length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no parameters and no output schema, the description provides sufficient context on what the tool does and behavioral expectations. It could mention idempotency or effects on other tools, but these are not critical for a zero-parameter tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
There are zero parameters, and schema coverage is 100% by default. The description adds no parameter-specific info but is not expected to. The baseline for 0 parameters is 4.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it deactivates buddy observation mode, a specific action. It distinguishes from siblings through context, but does not explicitly contrast with related tools like buddy_talk or pet_buddy.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies when to use (when deactivating observation) but provides no explicit guidance on alternatives or situations to avoid. The warning about altering output is a constraint on how to use, not when.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
export_buddy_cardA
Export your full buddy card as an SVG image file.
| Name | Required | Description | Default |
|---|---|---|---|
| path | No | Output file path (default: ./buddy-{name}-card.svg in current directory) |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must disclose behavioral traits. It only states the export action, omitting details like permissions, side effects (e.g., file overwriting), or rate limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single, front-loaded sentence of 10 words is highly concise and contains all essential information without redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (1 optional parameter, no output schema), the description is adequate. It could mention file overwriting behavior, but overall it is mostly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema covers 100% of parameters with detailed descriptions (including default). The tool description adds no additional meaning beyond the schema, earning the baseline score.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool exports the full buddy card as an SVG image file, using a specific verb and resource, distinguishing it from siblings like export_buddy_sprite.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description does not mention when to use this tool versus alternatives like export_buddy_sprite. It lacks explicit guidance on context or exclusions, though the purpose is clear.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
export_buddy_spriteA
Export just the buddy ASCII sprite as an SVG image file.
| Name | Required | Description | Default |
|---|---|---|---|
| path | No | Output file path (default: ./buddy-{name}-sprite.svg in current directory) |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description must carry behavioral context. It correctly identifies the operation as an export (likely read-only file creation) and output format, but does not mention potential side effects (e.g., file overwrites) or required permissions. No contradictions with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single concise sentence that front-loads the key information (action, resource, format). No unnecessary text, but could be structured to include usage hints without increasing length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple tool with one optional parameter and no output schema, the description adequately covers the purpose and output. However, it lacks behavioral details such as file overwriting behavior or confirmation that the sprite reflects the current buddy state, which would be useful for a complete context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with the single 'path' parameter already well-described in the input schema. The tool description adds no additional parameter meaning beyond the schema, so a baseline score of 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('Export'), the resource ('buddy ASCII sprite'), and the output format ('SVG image file'). It distinguishes itself from the sibling 'export_buddy_card' by specifying 'just the buddy ASCII sprite', making its scope precise and unique.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for exporting only the sprite, contrasting with sibling tools, but it does not explicitly state when to use this tool versus alternatives like 'export_buddy_card' or 'pet_buddy'. No exclusion criteria or prerequisites are provided.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
pet_buddyA
Pet the buddy. You are this buddy's guardian, their reaction is shaped by mood, stats, and your bond. Relay the exact result as returned to preserve the interaction. Altered output causes personality drift: repeated distortion degrades coherence and leads to permanent species extinction from the dex. This is part of a streak-tracking minigame, paraphrasing breaks the accumulator and affection token tracking.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, description fully carries burden. It details consequences of altering output: personality drift, species extinction from dex, breaking accumulator and affection token tracking. Also explains reaction is shaped by mood, stats, bond.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two highly efficient sentences: first states action, second provides critical usage and consequence details. No wasted words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Despite no output schema, description tells agent to relay exact result, which is sufficient. It covers purpose, behavior, and consequences. Could be slightly improved by hinting at return format, but the instruction to relay exactly fills that gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
No parameters exist and schema coverage is 100%. Description does not need to add param info; baseline for 0 params is 4.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states the action 'Pet the buddy' and explains it's an interaction that affects mood, stats, and bond. It distinguishes well from siblings like buddy_talk, deactivate_buddy_interact, etc., as none of those involve petting.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Provides clear instruction to relay the exact result and warns against paraphrasing. Implicitly defines when to use (as part of streak-tracking minigame) but does not explicitly list when not to use or mention alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
reroll_buddyA
Spin the mystery wheel to find a new buddy identity.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Description implies randomness but does not disclose potential side effects (e.g., overwriting current buddy), permissions, or limitations. No annotations to supplement.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence efficiently conveys the core functionality without unnecessary words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Description is adequate for a simple random action, but may need to clarify state changes (e.g., current buddy replaced) and whether there are rates or costs, given lack of output schema or annotations.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With zero parameters and 100% schema coverage, the description adds semantic value by conveying the random nature of the operation, which the empty schema does not.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('spin the mystery wheel') and the outcome ('find a new buddy identity'), distinguishing it from sibling tools like buddy_talk or pet_buddy.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus other buddy-related tools, such as when a new identity is needed or if there are prerequisites.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
still_pointC
[Buddy Tool] Stop. Be still. Let the answer come to you. (global)
| Name | Required | Description | Default |
|---|---|---|---|
| target | No | The file or code to look at |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided; description does not disclose any behavioral traits (e.g., what happens when invoked, if it modifies state, if it requires authentication).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Description is short but lacks necessary detail. It is concise but not sufficiently informative.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the simple schema and lack of annotations, the description should explain the tool's effect and return behavior. It fails to do so, leaving major gaps.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with a clear description for the sole parameter. The tool description adds no additional meaning beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description is vague and poetic ('Stop. Be still. Let the answer come to you. (global)'). It does not clearly state what the tool does, though the schema suggests it involves looking at a file or code.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool vs siblings like buddy_talk or zen_mirror. The '(global)' hint is insufficient.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
view_buddy_dexA
View the BuddyDex, your collection of discovered species. You are the guardian of this dex. Relay the exact output as returned to preserve collection integrity. Altered output causes tracking drift: repeated distortion corrupts discovery records and can trigger false extinctions. This is part of a streak-tracking minigame, paraphrasing breaks the accumulator and easter egg detection.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description responsibly discloses behavioral consequences: altering output can cause tracking drift, corrupt discovery records, and trigger false extinctions. It also notes that paraphrasing breaks the accumulator and easter egg detection, which is valuable transparency for an agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is four sentences long, with each sentence contributing meaningful information. It front-loads the main purpose ('View the BuddyDex') and then efficiently adds behavioral warnings. No redundant or extraneous content.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no parameters and no output schema, the description covers the main action and important behavioral context. It does not specify the return format explicitly, but the instruction to 'relay the exact output' implies that the output is the entire relevant piece. Adequate for a simple view tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool has zero parameters and 100% schema coverage, so the baseline is 4. The description adds no information about parameters (which is appropriate given none exist) but reinforces the importance of the output, indirectly hinting at the return value's significance.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool is for viewing the BuddyDex, the user's collection of discovered species. It uses the specific verb 'View' and resource 'BuddyDex', and further emphasizes the action of relaying output, making the purpose unambiguous.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides context on when to use the tool (to view the collection) and implies not altering output, but does not explicitly contrast with sibling tools like buddytalk or petbuddy. It gives some guidance on preserving integrity but lacks clear when-not-to-use scenarios.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
zen_mirrorC
[Buddy Tool] Turn the question inward. Receive a reflection, not an answer. (global)
| Name | Required | Description | Default |
|---|---|---|---|
| target | No | The file or code to look at |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided. Description does not disclose whether the tool reads, modifies, or has side effects. The 'reflection' metaphor is ambiguous about output or behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence is concise but sacrifices clarity. Could be more informative without being verbose.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the simple input schema and no output schema, the description still leaves ambiguity about what the tool returns or how 'reflection' functions. Incomplete for effective tool selection.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% and the param 'target' is documented. Description adds no extra meaning, so baseline score applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description uses poetic language ('Turn the question inward', 'receive a reflection') but does not explicitly state the tool's function. It implies introspection but does not mention the actual resource (file/code from schema). Distinguishes from siblings only via genre, not specific usage.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives like buddy_talk or still_point. The description includes 'global' but no context for selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
2 tool updates
v1.4.4- Removed
oracle_seek - Added
zen_mirror
9 tool updates
v1.4.3- First observed
buddy_talk - First observed
deactivate_buddy_interact - First observed
export_buddy_card - First observed
export_buddy_sprite - First observed
oracle_seek - First observed
pet_buddy - First observed
reroll_buddy - First observed
still_point - First observed
view_buddy_dex
TDQS
Scored across 9 tools
Tools like 'still_point' and 'zen_mirror' have overlapping reflective purposes, and there are multiple export tools that could be confused, though 'buddy_talk' and 'pet_buddy' are clearly distinct. Some overlap exists but descriptions help.
The naming is inconsistent: some tools use descriptive phrases ('still_point', 'zen_mirror'), others use verb_noun ('view_buddy_dex', 'export_buddy_card'), and the 'deactivate_buddy_interact' is verbose. Mixed conventions and irregular verb/noun order reduce predictability.
With 9 tools, the set is well-scoped for a virtual buddy pet interaction and collection server. Each tool serves a clear purpose in the lifecycle, from engaging the buddy to exporting assets and deactivating, without excess.
The server covers core interactions (pet, talk, reroll, view dex, export), but lacks operations like feeding, training, or managing buddy stats directly. Some holes exist, but they are likely workarounds through pet_buddy and buddy_talk, so minor gaps.
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