Secured folders: Show permissions in Details pane of Google Drive interface
Currently, the permissions for a folder within a Secured Folder library do not show up in the details pane. It does show up for documents, and it shows up for folders & documents if you are using a Team Folder.
Just not for a Secured Folder, which is pretty odd. And the workaround (to open up the item in AODocs interface) is pretty cumbersome.