Choose authoritative sources
A document can be easy to find and still be outdated or irrelevant. Identify which systems own the current answer and how changes reach the knowledge layer.
Carry permissions through retrieval
A person or agent should only retrieve material they are allowed to use. The access model should be considered during ingestion and again when information is returned.
Let people check the answer
Source references make a recommendation easier to review. For consequential work, show the document or record behind a claim and make uncertainty visible.