When the tool you are using reaches critical durability (break on next use), it will render as Broken and you will not be able to use it until you repair it.
Better Durability was made by Darkorg69 and forked by TsXor who added a Blacklist and support for Armors and Shields in 1.19. Following the MIT license, this mod is an unofficial Forge 1.20.1 port of their excellent works.
As for this port, an experimental whitelist is added for forcefully protection for those without vanilla types like knives from Farmer's Delight. Their durability will be set to 2 when being about to break. However, since only the click event is canceled, some situations you might not like may occur with the protection of some items.
