Which harnesses can search the web without an add-on?

Present but not verified. 9 more harnesses register a web search tool that has not been read from source: Claude Code WebSearch, dsh web_search, Grok Build web_search, Hermes web_search, Kimi Code web-search, MiMo Code websearch, OpenClaw web_search, opencode websearch, Qwen Code web_search. They are left out of the table below rather than shown as empty rows — a blank cell would claim the behaviour is absent, which is a different thing from not having checked.