I've read the questions about merging the tags, definitive answer and the duplicate one. I appreciate that the tags are in fact different,
physics is for mathematics which have applications in physics, whereas
mathematical-physics is more to do with spectral theory and QM etc, 'modern' mathematics in physics and an answer indicates, like that in Reed-Simons books.
These seems fine to me but I don't believe the tags reflect this clearly enough. Firstly the excerpts contain some very similar wording:
Mathematical physics consists of the application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and for the formulation of physical theories.
Questions related to mathematical physics which include application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and for the formulation of physical theories.
Which is which?
Secondly it's not consistent, For
physics there's an excerpt and tag wiki, but for
mathematical-physics there's only an excerpt and what is essentially the tag wiki is squashed in here:
This tag is intended for questions on methods used e.g. in quantum mechanics or general relativity at an advanced undergraduate or graduate level. (*)
If I'm not mistaken the excerpt should explain how to use the tag whereas the wiki should give a bit of background to the tag like for example the (calculus) one. So maybe have (*) for the excerpt and then explain some of the background for the tag in the wiki.
Along these lines, I don't think, as present on the (physics) tag, linking to general wikipedia pages (which have a very large amount of text and sections) is very helpful to anyone. Surely one could quote and cite the specific information that is useful rather than have these vague links.
Lastly my motivation for asking this is that since I'm studying physics and at the moment (although there is some discussion) mathematical questions with less of a conceptual problem tend to be closed on or migrated from physics stack, so it might be useful to have the tag(s) read a bit clearer.