Create / remove custom permissions

Hi,

I created a custom permission when I registered a Web Client Extension (via MOB). In the ExtensionPrivilegeInfo I have:

dynamicProperty     DynamicProperty[]     Unset

dynamicType          string                        Unset

privGroupName    string                        "Global"

privID                    string                        "Global.MyCustomPrivilege"

The problem is that in the vSphere Web client, in the Roles View, the privilege appears as: privilege.Global.MyCustomPrivilege.label, instead of showing a description (like with the default ones).

Is there a way to add a description for a custom privilege? I could not find anything related.

Also, I noticed that when I un-register the extension, the custom privilege is not removed, and no method is provided for removing that. Is this a limitation?

Thanks.