If you click on 'Learn more' in the flyover panel for Hide this post, the link should open a new tab or window with the Revision/Delete policy page (WP:RVDL):
http://en.wikipedia.org/wiki/Wikipedia:RVDL

See our original feature requirements for this request:
http://www.mediawiki.org/wiki/Article_feedback/Version_5/Feature_Requirements#Intermediate_Feedback_Page_2_-_Monitor.27s_view

Version: unspecified
Severity: major