Custom Field management

Would be nice to be able to add a description/tool tip/or some reference to a custom field to identify how it is setup and what it is used for for Custom Field management. Right now we have to document outside of Wrike all of our custom fields, what level they are and how they are setup/programmed to function along with a description of what they are used for. Would be nice to keep this all in Wrike as build/reference notes on these fields.