{
  "version": "s19",
  "decisions": [
    {
      "id": "normalized-mcp-namespace",
      "title": "MCP Tools Use a Normalized Namespace",
      "description": "Discovered tools are exposed as mcp__server__tool. The prefix makes the source explicit and avoids collisions with built-in tools or tools from another server.",
      "alternatives": "Using the raw tool name is shorter, but search from two servers could overwrite each other.",
      "zh": {
        "title": "MCP 工具使用规范化命名空间",
        "description": "发现到的工具会暴露为 mcp__server__tool。前缀让工具来源明确，也避免和内置工具或其他服务器工具冲突。"
      },
      "ja": {
        "title": "MCP ツールは正規化された名前空間を使う",
        "description": "発見されたツールは mcp__server__tool として公開されます。接頭辞により出所が明確になり、組み込みツールや別サーバーのツールとの衝突を避けます。"
      }
    },
    {
      "id": "dynamic-tool-pool",
      "title": "Tool Discovery Updates the Active Tool Pool",
      "description": "After connecting to a server, the runtime assembles a new tool pool for the next LLM call. The model can only use MCP tools after discovery has made them visible.",
      "alternatives": "Preloading every possible MCP tool would create a huge prompt and expose capabilities the user did not request.",
      "zh": {
        "title": "工具发现会更新活动工具池",
        "description": "连接服务器后，运行时会为下一次 LLM 调用组装新的工具池。模型只有在发现阶段让 MCP 工具可见之后，才能调用它们。"
      },
      "ja": {
        "title": "ツール発見がアクティブなツールプールを更新する",
        "description": "サーバー接続後、ランタイムは次の LLM 呼び出し用に新しいツールプールを組み立てます。MCP ツールは発見で可視化された後にのみモデルが利用できます。"
      }
    },
    {
      "id": "external-results-append-like-tools",
      "title": "External Results Reuse the Tool Result Path",
      "description": "MCP responses are appended to the conversation like ordinary tool results. This keeps the agent loop unchanged while still letting external systems participate.",
      "alternatives": "A separate external-response channel would make MCP feel special and require extra loop logic.",
      "zh": {
        "title": "外部结果复用 Tool Result 路径",
        "description": "MCP 响应会像普通 tool result 一样追加到对话中。这样 agent 循环无需改变，同时外部系统仍然可以参与。"
      },
      "ja": {
        "title": "外部結果は tool result 経路を再利用する",
        "description": "MCP の応答は通常の tool result と同じように会話へ追加されます。エージェントループを変えずに外部システムを参加させられます。"
      }
    }
  ]
}
