Document AI is most valuable when it helps a reader navigate the source. A confident paragraph without a route back to the page creates a new verification problem.
Answers are a reading aid
AI PDF Reader uses clickable page-exact citations so the reader can inspect the surrounding text. The answer accelerates navigation; the document remains the source.
Local processing changes the default risk
On the local-model path, the document and question do not need to be uploaded to a vendor cloud. That is particularly useful for drafts, internal reports and material that is not ready for broad distribution.
Good review habits still apply
Check quotations, numbers, exceptions and conclusions in context. A citation makes review practical, but it does not turn generated text into authority.