What is the (calculus-identities) tag intended for?

Question

The tag calculus-identities has been created about a year ago in this question: Quotient rule/Quotient rule.

When I look at questions which have this tag now (31 questions at the moment) or which were tagged with this tag in the past, it seems that people are using it for all sorts of stuff. (Basically anything where some kind of identity appears. To me it seems somewhat similar to the previously deleted (algebraic-identities) tag.)

The tag-info is a natural place where we could look for the intended use if this tag, but it is empty at the moment.

So I have basically two questions:

• Can this tag be useful? Should we keep it or should be removed?
• If we want to keep it, could at least the intended usage of the tag be clarified (and the tag-info edited accordingly)?

Answer 1

I suggest to remove the tag calculus-identities. With the empty tag-info (and no suggestion for the scope of this tag in this discussion) the tag is very likely to be used inconsistently and it is rather questionable whether it is going to be useful. (It would be different matter if somebody suggested a reasonable guide for the type of questions where this tag is going to be used. But even in such case, the tag is likely to be misused and we would have to keep an eye on this tag and remove it from unsuitable question.)

^{Since nobody posted an answer so far, I have posted an answer myself. In this way we can see from voting (and possibly comments) on this answer what the community thinks about the proposal to remove the tag. (There is a comment by Jens suggesting to remove the tag. But since comments are less visible and they cannot be downvoted, we probably cannot read too much into the reception of that comment.)}