This read-only DisplayString carries the error/alarm message text included in a trap sent by the device; the object's own DESCRIPTION is blank, but it is referenced by the temp-msg TRAP-TYPE alongside deviceName as the alarm content. An admin receiving a temp-msg trap reads this string to see the human-readable description of what alarm condition occurred on the device. For illustration, this object's value in a trap might read something like "Temperature over limit" to describe the fault being reported.