I think this is only with efficiency tools, but when you have used up the tools' last use and they break, they will almost always keep reappearing as tool with one use, then you use them again and they break, then they reappear, then they keep breaking, etc.
It's a very old bug.
Duplicate of MC-1040, please use the search function to see if your bug has already been submitted. Currently over 58% of tickets are being closed as duplicate.