This might sound stupid at first but hear me out - As of right now /enchant only works for diamond gear. This makes sense because who would want to enchant anything else, but I think it should be available on all tools. If not all tools at least let it go onto enchanted books and from there be able to enchant all tools. Maybe it sounds stupid but it actually says in the /enchant menu that it works on every item of that class. I don't mean that you should be able to enchant any item with anything, but for example I think I should be able to enchant a gold pickaxe with haste 3.