Is [recovery] a meta-tag?

Is a meta-tag and thus worthy of being removed? In particular, it seems to fail the first test:

1. If the tag can’t work as the only tag on a question, it’s probably a meta-tag. Every tag you use should be able to work, more or less, as the only tag on a question. Meta-tags, like [beginner], [subjective], and [best-practices], are useless by themselves — they tell you nothing at all about the content of the question.