This is related to https://e621.net/forum/show/213106 , but it is its own topic because it's a different feature request.
Requested feature overview description.
A new metatag which will allow users to search for any arbitrary page index within a pool. This tag would look something like "poolindex:#"
Why would it be useful?
The most obvious usage would be to be able to list all pools by their cover pages using "poolindex:0".
In my experience, trying to casually browse pools on e621 is a frustrating experience. You can either do a search with inpool:true, which returns a collection of thumbnails with no indication of which belong to the same pool; or you can go to e621.net/pool/index , where you receive a 1-entry-per-pool listing, but with no thumnails. A new tag would alleviate that. Me, and forum users DragonFox69, savageorange, and Maxpizzle have all expressed interest in this feature in the link above.
Other uses are possible as well.
What part(s) of the site page(s) are affected?
Just the part of the site that fills in the other metatags, I would think.
Updated by Lance Armstrong