LLMs can not point you to sites, only in a general direction. That is because complete URLs do not exist as single tokens in any of the large models. It can synthesize a plausible-looking url, and if you're lucky that URL might even exist. But that doesn't mean that there is any relation between between the text surrounding a hyperlink in LLM output and the text on the linked page.

AI agents can verify and summarize URLs, but a plain LLM can not.

I bow to your correction. I was using LLMs as a sloppy shorthand for modern AI agents with best interfaces.