That's the problem, the player can't be given that by anyone but the gm at the time of roll/check. They are something different than "permission" fo to do something entirely under the GM's responsibility. They are there creating friction should the gm actually do the thing that the gm alone is given responsibility for deciding..Thanks, but those aren't skill checks. They're permission to add one's proficiency bonus to an ability check. Sort of like when one uses the (unlisted) Attack skill to add proficiency to a strength or dexterity check.
I'd bet there's a magic item shop in that game. Why not an "information shop" too? Anyway, the term she was looking for is "innkeeper" or perhaps "bard."
I'm pretty sure imagining stuff in one's head is the point of the game.
if wotc actually wanted to invest effort in supporting the gm before the "what is convenient for players" was finalized that section of the sheet would look more like the weapon armor and tool proficiencies section so it allows the gm to expand on it as needed and the expected interaction players asking if x applies to y attribute check is encouraged rather than resisted..