what little information she had
...And there's another little mystery. Valeris was not the top Starfleet conspirator, but rather a field operative in control of two lesser operatives. Why did she need to know exactly who were pulling the strings?
She might have known or figured out that Cartwright was her boss, even if there were further middlemen. And no doubt she was in on the whole deal exactly because of what she claimed was her motivation: her patriotic feelings and pro-UFP logic called for it. Cartwright could safely have drafted her personally, even going so far as to claim that Kirk, while victimized here, would greatly approve of what she did if he knew.
The assassination plot hinged on a top-level Klingon being in on it, too, and Chang would again be obvious even if Valeris weren't explicitly told it was him. And Cartwright could well have told: "This whole thing is gonna work because we have this Klingon in our back pocket. We help him out with his political assassination, then backstab him, and we have both our war and a Klingon Empire in chaos. This is our sucker; study the file."
But why would Valeris need to know the Romulans were in? Surely knowing about all three leaders would reveal to the casual logician that one side was playing two against each other. And while the cream of the cream of the conspiracy could delude themselves into thinking they'd emerge victorious nevertheless, the risk of lower-downs not thinking that way would be immense.
Valeris plays out perfectly for a mid-level conspirator, one who has ideals but ultimately isn't willing to die for them and can choose to be captured. She doesn't make for a convincing top-level operator. What happened to "need to know" here?
Timo Saloniemi