I don't really understand why this exists, whether it's a feature or a bug, or both, but it's gotta go. This is just going to end up in people selling their tools and whining about it. I'm not sure if diamond tools are also sold, or if star tools are, but... ... Yeah, please just make tools unsellable again. There's no economy in selling tools to the server and it's only a pain in the ass.
Diamond tools dont sell to the server so its not much of a problem, also idk if the tool sells if you own it or not so you could try that?