Hoes do not lose durability. A wooden hoe has 60 uses. The hoe did not break even after 60 uses. My device is a Samsung Galaxy Note 2 GT-N7100. I have even tried this with a iron hoe.
MCPE-10171
Hoe durability
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
Tablet - Android - Other (Specify in description)
Android 4.4.2
0.12.1 Beta 9
Retrieved
If you did not already, please remember to perform a search before creating a ticket to see if your bug hasn't already been reported. This issue was reported previously as MCPE-9786. Comment your experience there!