The inside trap is a running play where the quarterback will take the snap, turn, and then hand the ball directly to a fullback.
On top of that, most of them all believe they should play another position.
I have never coached a lineman who wouldn’t immediately change positions if given the opportunity.
They must be able to anticipate their assignment because they are not always immediately engaged at the snap.
Guards have to know when to do what they are coached to do, but also be able to improvise at times and do what it takes to get a block.