Pretty surprised to hear this. I would think (assuming they are LLM written as parent suggests), that MS could throw a large context "pro" LLM at the code base and you should get perfect docs, updated every release?

More perfect than a person where I might mistakenly copy/paste or write "Returns 404" but the LLM can probably see actually return a 401.

I'm not a stranger to LLMs hallucinating things in responses but I'd always assumed that disappeared when you actually pointed it at the source vs some nebulous collection of "knowledge" in a general LLM.