The term usually points to analyst work
People use the phrase intelligence document in different ways, but it usually refers to a file or collection of files that someone needs to interpret. That could be research material, diligence evidence, investigative documentation, policy packs, or case files. The common theme is that the user has to think through the content, not just store it.
The workflow needs synthesis, not just search
A useful workflow must help the analyst find the right passages, compare documents, and surface the issues that matter. Search alone is not enough if the user still has to stitch the answer together manually.
The product still has to keep the evidence visible
Even when a system helps with synthesis, the source should remain close. Analysts, reviewers, and managers still need to see what supports the conclusion. That is what turns a clever demo into a usable production workflow.