This functionality is already built in.
For instance, look here:
http://inthemdl.net/index.php?rss&albumtitle=In+The+Tree&albumname=audio%2Finthetree&lang=en_US
That is just the album rss feed generated from the album page. It automatically includes the links to the mp3, descriptions, album thumbnails if you've uploaded them.
If you wanted to remove the default thumbnail you could modify either the default thumbnail to be a blank image, or modify the rss feed function to not include that.
Only problem with modifying any of these is that when you upgrade to a new version the default core files will replace any you've modified.
Perhaps submitting a feature request for some option-customization of the rss feed would help.