Going a different way...
A covenant council meeting is much like any governmental or business meeting. Rarely are things decided at the meeting. Plans and broad strategies are discussed, and then parts of the problem are parceled out to individuals to handle. If there isn't enough information to act, someone needs to define their unknowns and then attempt to uncover them. Right now, the characters have a mess of unknowns. To borrow from Donald Rumsfeld, they need to quantify their known unknowns and resolve that situation. It is possible, that during that process unknown unknowns pop up. It is possible, that players, collectively could overlook something, and then I bonk someone on the head at a later date with that. You have the things you know and the things you think you know (you is referencing the character). If you're unsure about something you can ask me. I may adjudicate that with an ability roll.
Saying your character has been in the records room is about saying like you've been in a library. One doesn't know the contents of all the books within the library, just that there are a lot of books, and some of them may be useful in researching the topic at hand.