Hello there
Is Topple toe from Marshall dedication usable without free hand or trip trait weapon ? Other feats like this (Combat Grab) don't let this doing because of trigger, but not in the Topple Toe trigger, so i'm confused.
Other than allowing you to do it as a reaction, Topple Foe doesn't say anything about changing Trip in any way. So all Trip rules apply normally, including the need for a free hand or Trip weapon.