Not sure what exactly you mean by post before or after, but here is what I imagine a good flow would be:
Player says "I want to do x with the goal of achieving y" such as "I want to manipulate the families with my telepathy into leaving so they are not here in case the monster is nearby"
I say either "I don't think that applies" or "no need to roll, x happens" or "ok, here is what you can expect if you roll"
If I say to roll, you then decide if you want to roll and the result happen as I said to expect
If you are actively battling a monster, I will generally be in charge more and say things like "the monster suddenly my leaps forward and looks to be trying to punch on hunter x, what do you do hunter y?" Hunter Y would then declare what they want to do and just roll because things are happening so fast that expectations might not be known until after. Hunter Y might say "I jump in front of the monster to keep hunte x safe" and just go ahead and roll protect someone, or they might says "I shoot at the monster" and roll kick some ass, and if the monster survives it attacks the original target and then lashes a little at the one who shot it too