If you drop one of your favorite steel planes and dent the sole, metal displaced from the dent will likely leave a raised ring around it that can scratch wood. Simply rub the surface with a fine honing stone to remove the raised area. Once done, you can ignore the remaining dent, oil the unplated surface, and put the plane back to work.
If you have a step ladder that is tall enough so you can’t see the top when standing beside it, be extra cautious about tool placement. Leaving a tool like a hammer on top is easy to forget. When you move the ladder, it could slide off and drop on you. The best bet is to use a tool belt to carry unused tools, either strapped to your waist or tied around the upper part of the ladder.