Two answers to the same question
You.com and Lune both concluded that the useful product for agents is retrieval infrastructure, not another chat window. That agreement is worth naming, because most of this category is still shipping chat.
The split is what the agent should read. For a commercial question the live web is the only right answer. For a claim that has to survive a paper or a grant review, it is the wrong one, because the web will happily hand back a blog post about the study instead of the study.

