This object is intended to hold a textual description of an equipment diagnostic test result, but its DESCRIPTION clause in the source MIB is empty, so its exact content and format aren't documented; based on its name and neighboring tnEquipDiagStatusResult object, it likely carries a human-readable summary of what a specific diagnostic test checked. An administrator would read this alongside the paired result object to get a descriptive label for a given diagnostic test entry. For example, tnEquipDiagStatusDescr might return a string like 'Power Supply Self-Test' to label what tnEquipDiagStatusResult is reporting pass or fail for in that same row.