What Metadata should be editable by users/admins?

What metadata should be accessible via the API?

##Images
* uuid
* owner
* uploaded
* modified
* version
* size
* checksum
* name
* desc
* os_variant
* os_type
* os_arch
 * mandatory
 * settable by user
* hypervisor
* permissions
* raw_file

##Groups
* name
* protected
* members
* permissions

## User
* user_name
* full_name
* email
* suspended
* deleted
* certificate
* quota
* images
* groups