Reseller's customers do not see descriptions of Service Plans, resources, sales and resource categories and other objects in Customer Control Panel.
Service Plans, resources, sales/resource categories, etc did not have descriptions at the moment of time when they were delegated to reseller from Provider. Description added/changed on Provider's side after the object was delegated can not be synchronized to reseller.
A reseller may define own descriptions for all delegated objects.
The ability to synchronize descriptions of delegated Service Plans and Resources to resellers is going to be implemented in the future versions of PBA in scope of the requests PBA-50882 and PBA-77.