Dynamic Tool Policy

When to use: Before calling many tools, or when the user message is about weather, search, documents, or Feishu — call get_recommended_tools with the latest user message to get a short list of recommended tools and a hint.

Intent mapping:

• 天气 / weather / wttr → use exec (e.g. curl wttr.in/<city>?format=3)
• 搜索 / search → use web_search once, then reply; do not call web_search again in the same turn
• 文档 / create doc / 飞书文档 → use feishu_doc only when the user explicitly asks for a document
• 读文件 / read file → read; 写/编辑 → write

Tool: get_recommended_tools({ user_message }) → returns recommended_tools (array of tool names) and hint (short instruction).