REST API documentation for Tags

Hi,
It says "No Docs Yet" for Tags/Tag here - http://codex.galleryproject.org/Gallery3:API:REST

Any ideas when the docs will be made available? I am specifically looking for this item:

All the items for a tag. GET, POST, DELETE
http://github.com/gallery/gallery3/blob/master/modules/tag/helpers/item_tags_rest.php

I am trying to figure out what REST URL can give me that information. I tried few variations but nothing seems to work e.g.
http://oursite.com/gallery3/index.php/rest/items?tag=nature
http://oursite.com/gallery3/index.php/rest/tag/nature
http://oursite.com/gallery3/index.php/rest/item_tag?tag=nature

I have also checked suprsidr's amazing G3 Rest Plugin for Wordpress but nothing specific to Tags there as well...

Can someone please provide some clues...

Thanks,
Mick