diff --git a/libs/telemetry/src/main/java/org/opensearch/telemetry/diagnostics/DiagnosticsEventListener.java b/libs/telemetry/src/main/java/org/opensearch/telemetry/diagnostics/DiagnosticsEventListener.java
index c102750714d12..b0a09974bff9d 100644
--- a/libs/telemetry/src/main/java/org/opensearch/telemetry/diagnostics/DiagnosticsEventListener.java
+++ b/libs/telemetry/src/main/java/org/opensearch/telemetry/diagnostics/DiagnosticsEventListener.java
@@ -18,6 +18,8 @@
 import org.opensearch.telemetry.tracing.listeners.TraceEventsService;
 
 /**
+ * One of the pre-defined TraceEventListener for recording the thread usage using {@link ThreadResourceRecorder} and
+ * emitting metrics using {@link MetricEmitter}.
  * When a {@link Tracer} is wrapped with {@link TraceEventsService#wrapAndSetTracer(Tracer)}
  * and all Runnable associated with a trace are wrapped with {@link TraceEventsService#wrapRunnable(Runnable)},
  * this class records the resource consumption of the complete trace using provided {@link ThreadResourceRecorder} and emits corresponding metrics using