Sometimes a question is asked under a perfectly suitable tag, but is given an answer which is addresses respects strongly related to other tags.
What should be the proper etiquette regarding retagging the question?
Obviously when there are many answers addressing the question within the confines of the original tags, there is no need to retag. What happens when there is only one answer, or even no other?
Is it correct to retag to question and add/replace the tags?