cucsQosclassDefinitionDescr is a read-only SnmpAdminString on the Definition object holding the administrator-supplied description text for this system QoS class. An admin reads this free-text field to recall the intended purpose of a QoS class, such as which traffic types it was set up to prioritize. For example, a description noting 'reserved for storage traffic' would tell an admin not to repurpose that class's bandwidth share for another workload.