Animating the snap tool

I would like to see the snap tool with animation capabilities. Recently i made a charater and i want it to do a walking cycle and i have a hard time making the charater stick to the surface. So my i dea of the snapping tool would be that you can activate the snapping tool to snap to surface or vertex and press the i for keyframe and it could snap to the surface.I think it would be a time saving feature for character animators.

Thanks in advance