[He wishes he had knowledge to share, bro. Maybe it would make all of their lives easier.]

I understand. [His lips quirk, amused.] I know there is information that you and the others have that I do not. It does not bother me. Miss Maxwell has said much the same.

[He shakes his head, simply, and says equally simply and plainly:]

I trust you, Noctis. You shall inform me when you feel I need to know, and no sooner. If it means your safety and the safety of others, then remaining silent is wise.

[He's certainly not offended by it.]