Do teams scratch agents’ backs?

Thinking about the Kareem Hunt thing
Did the Saints do his agent a solid by bringing him in in exchange for ____(?) in the future
This is my scenario:
KH Agent: hey Saints, can y’all invite KH in so we can pressure Indy? In exchange I’ll make sure y’all are first in line when Big Stud LB comes on the market next year?

I imagine there’s protocol against that, but I can’t help feel like something like this was going on
Their backs at LEAST.