The IGetCommandUsage function can be used to provide the usage of command.

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import. import mods.zenutils.command.IGetCommandUsage;

The IGetCommandUsage Function is a function with a ZenUtilsCommandSender parameter.

The function needs to return an unlocalized name. You can use language files to localize it, or CraftTweaker's setLocalization alternatively.