He doesn't go too in-depth - he's still pointing out some parts of the college on the tour, after all, this just makes smalltalk and gives him a feel for how Gene's mind works - and it doesn't take too long. When he judges himself satisfied with his overview, they've reached the front area of the college.

"Well, if you want to wander off, I won't keep you - but I can guarantee there's more than I can teach you in a day. Though I don't know your schedule..."

That's a prompt to figure out how and how often to do this. It hasn't escaped the back of his mind that this might also be a good way to keep an ear out for Tony.