Sphjinx Assuming you are using a tool item, you can put a script on the object you use the tool on, for example, a tree object you would use a axe on.
In the scripts section there will be a drop down panel for Event, and in there should be your tool item.

Assign a script to that event that has a Play Animation node on it to play the animation that should occur when you use the tool on that particular object.
