I have no idea what a "workout tool" is...
A bevel knife is a triangular knife which is used to scratch inside of holes or to cut down the holes' rim, shaping the bevel of the hole. You do not necessarily need one, a round file and sandpaper will do the same.
But is is sensible to have it at hand - especially when you have a new ball or did some changes to the holes in general. I found that I can only figure out on the lanes, when I actually try the ball, how to change or design a hole, making many small adjustments until it fits.
The same goes for a tape extraction knife. But since tape IS sticky and hard to peel free, a metal or plastic spatulum is a handy thing. Personally, I always have fingernail scissors in the bag which do that job nicely, as well as being a tape insertion and cutting aid and to cut fingernails, if need be.
A rasp would do a similar job as a bevel knife (see above), shaping the holes and the bevel to your desires and needs. But I'd prefer a fine round file (e. g. for keys).
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DizzyFugu - Reporting from Germany
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