searxng
Search the web using a local SearXNG instance (privacy-respecting metasearch engine). Use when user asks to search, look something up, "搜索", "搜一下", "查一下", or when web_search returns poor results. Supports categories (news, images, videos, IT, science), time filters, language, and multiple engines (Google, Bing, DuckDuckGo, etc.). No API key needed — fully self-hosted.