I've heard that mods and the like have the ability to apply tags to arbitrary searches. I'd like someone to do that for grainy on pool:3020, since there's a lot of images and I am lazy. This is the kind of grainy you get on smartphone cameras in low-light conditions. If mods don't have that power, lmk so I can waste three hours writing a script to automate it.

Done.
Privileged+ have that power, not just staff.

The Mass Tag Edit function is only for moderators. However, there is a way for you to mass edit tags yourself albeit in a less swift method.
Under the search bar of the search results, you can find the Mode currently set as "View", switch it to "Edit" and you can quickly edit posts from the thumbnails themselves.
Be warned though that you must be absolutely sure that all of the posts you tag does contain the tags you are adding, otherwise it would be considered Tagging Abuse.

bitwolfy said: Done...

Thanx.

thegreatwolfgang said: ...Under the search bar of the search results, you can find the Mode currently set as "View", switch it to "Edit" and you can quickly edit posts from the thumbnails themselves...

Nifty! I have actually never noticed that lol