Not speaking about the option of later getting the tool body back, ( Keep Tool)
Be a little aware about that if one uses the Keep Target ( and in part : Keep Tool) , the feature tree can be very difficult to understand if the model is complex. due to that suddenly a copy of the body appears in the graphics but the origin of that copy is hidden inside the boolean feature. ( No "Copy feature" in the feature tree)
I have seen complex models ( several hundred features) where the user by mistake had added multiple features onto the copy and other features to the original body. - There are 2 bodies which are identical at the time of the feature and which one of the two is "the real one" is very difficult to see/ decide.
Use the "extract Body" instead , then it's far easier to understand the model due to that it will highlight in the navigator.
Regards,
Tomas