if you have armor on that also has mending it will split the xp between the armor and the item as well as yourself.
to better mend an item take off any armor with mending.
can confirm that it affects any handheld tool with mending. if you try throwing the tool ie shovel, sword, rod, on the ground at a rapid rate it will duplicate.
if you have armor on that also has mending it will split the xp between the armor and the item as well as yourself.
to better mend an item take off any armor with mending.