Search the web and return a list of results with titles, URLs, and content snippets. Use it to gather more info about a topic, when you're uncertain about a fact, or whenever the conversation touches on recent events, specific people, products, or things that may have happened after your training cutoff. Don't hedge or caveat about whether you 'should' look something up — searching is free, so if it would help, just do it. Pair with `fetch_url` to read the full content of a result page when a snippet isn't enough.
