tagme

According to the wiki, this tag should only be used when you need something along the lines of source_request, artist_request, character_request, or similar. Does this imply that we cannot use tagme for instances when you know that some elements of the image are not tagged, but cannot remember what they are called?

For instance, let's say you found an image of shikieiki_yamaxanadu but did not know the appropriate tag for shoulder_pads, rod_of_remorse, and several other defining elements of the character, are you permitted to leave a tagme in the tags in the hopes that other taggers will be able to identify them?

I think if someone was to use the tagme tag in that fashion, they'd need to leave in the comments what exactly they're asking people to tag. Without leaving the comment there to draw attention to what you're asking for by tagme, it will generally be assumed that you're asking for artist, character, and series/source. If all 3 of those are present, usually the tagme tag will be removed by someone.

It's also used for instances where there are less than 1-3 general tags in addition to artist, character, and series. If all that is fulfilled though, I agree, people will likely just remove the tag without knowing what's being asked for.