Is it appropriate to edit in tags to a question that relate exculsively to an answer (or the answer of the question?

For example, I answered this question. It is properly tagged with , , and . My answer utilized Animation Nodes, which also has its own tag.

Since the answer (and thus the page) now contain information about Animation Nodes, would it be appropriate to edit in the tag?

I have seen this type of answer occur more often recently, where the solution uses a totally different method than the question was tagged, specifically with , though I'm sure it also applies elsewhere.