Tagging convention for a help point

I stumbled upon a help point in a park, which I’d love to add to the map, but after reading through the wiki I can’t find a convention for tagging it. Any tips?

Itcould be a Tag:emergency=phone - OpenStreetMap Wiki ?


Do we have a non-emergency version of that? Loads of train stations have them as a way to auto-dial a help desk, but nothing appropriate is listed on the information=* page, which seems like the most logical place.

Edit for e.g.:
Help point

Which combines:

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