Whatever happened to "You can also attempt to search the facility for documents and other clues to figure out what led to the breach, and do your part in fixing the situation"? There just aren't enough documents lying around on random SCPs, events, and characters. As stated before by others, there should also be vlogs or AT LEAST recorded sound logs detailing various experiments, important events, conversations between personnel, and just the diaries of days in the lives of Foundation personnel (some guard talking about his love for the vending machine, a doctor's assistant describing how he sneaks out of labs during a certain hour - you can get creative here).
I also have another idea, that there could be a surveillance room with various screens that show events in certain rooms during real-time (maybe 079 could give you access?). In the room there could be two dead doctors slumped in the guard chairs (there's a first time for everything

). This room can be strategic, as you can see where certain SCPs and MTFs are patrolling. However, it should be random, with many screens randomly showing static instead of actual images - keeping the player scared and unsure. There could even be recorded film from previous dates, so the player could ACTUALLY learn what happened in the facility before the breach.
All this would help the player to truly understand where the hell he is and what the hell the Foundation actually does, and even figure out how the breach itself happened. Maybe all these clues could even help the player to escape! The most fun horror games are the ones where you can actually interact and immerse yourself in the environment rather than simply run around in it, and CB already does a pretty good job at this IMO.