The 2 following actions are available only if you have the right permissions ("Administer Quality Profiles and Gates"):
Add/Remove Tags:
* It is possible to add existing tags on a rule, or to create new ones (just enter a new name while typing in the text field).
* Note that some rules have built-in tags that you cannot remove - they are provided by the plugins which contribute the rules.
Extend Description:
* Extending rule descriptions is useful to let users know how your organization is using a particular rule for instance or to give more insight on a rule.
* Note that the extension will be available to non-admin users as a normal part of the rule details.