diff --git a/examples/features/csm_observability/client/main.go b/examples/features/csm_observability/client/main.go
index c89676c1c..8ba1e863a 100644
--- a/examples/features/csm_observability/client/main.go
+++ b/examples/features/csm_observability/client/main.go
@@ -16,6 +16,7 @@
  *
  */
 
+// Binary client is a client for the CSM Observability example.
 package main
 
 import (
diff --git a/examples/features/csm_observability/server/main.go b/examples/features/csm_observability/server/main.go
index 399e00c5c..b87f859aa 100644
--- a/examples/features/csm_observability/server/main.go
+++ b/examples/features/csm_observability/server/main.go
@@ -16,6 +16,7 @@
  *
  */
 
+// Binary server is a server for the CSM Observability example.
 package main
 
 import (
diff --git a/examples/features/customloadbalancer/client/main.go b/examples/features/customloadbalancer/client/main.go
index 47497043e..02170029c 100644
--- a/examples/features/customloadbalancer/client/main.go
+++ b/examples/features/customloadbalancer/client/main.go
@@ -16,6 +16,7 @@
  *
  */
 
+// Binary client is a client for the custom load balancer example.
 package main
 
 import (
diff --git a/examples/features/customloadbalancer/server/main.go b/examples/features/customloadbalancer/server/main.go
index 5bcf2c591..9f2cb24e3 100644
--- a/examples/features/customloadbalancer/server/main.go
+++ b/examples/features/customloadbalancer/server/main.go
@@ -16,6 +16,7 @@
  *
  */
 
+// Binary server is a server for the custom load balancer example.
 package main
 
 import (
diff --git a/examples/features/opentelemetry/client/main.go b/examples/features/opentelemetry/client/main.go
index 4bc3d5afb..071d7ba63 100644
--- a/examples/features/opentelemetry/client/main.go
+++ b/examples/features/opentelemetry/client/main.go
@@ -16,6 +16,7 @@
  *
  */
 
+// Binary client is a client for the OpenTelemetry example.
 package main
 
 import (
diff --git a/examples/features/opentelemetry/server/main.go b/examples/features/opentelemetry/server/main.go
index 78fbf6bf3..2bda00809 100644
--- a/examples/features/opentelemetry/server/main.go
+++ b/examples/features/opentelemetry/server/main.go
@@ -16,6 +16,7 @@
  *
  */
 
+// Binary server is a server for the OpenTelemetry example.
 package main
 
 import (
diff --git a/interop/observability/client/client.go b/interop/observability/client/client.go
index 5478efdbe..0a07994bb 100644
--- a/interop/observability/client/client.go
+++ b/interop/observability/client/client.go
@@ -16,6 +16,11 @@
  *
  */
 
+// Binary client is an interop client for Observability.
+//
+// See interop test case descriptions [here].
+//
+// [here]: https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
 package main
 
 import (
diff --git a/interop/observability/server/server.go b/interop/observability/server/server.go
index 7efab04bb..06209947b 100644
--- a/interop/observability/server/server.go
+++ b/interop/observability/server/server.go
@@ -16,6 +16,11 @@
  *
  */
 
+// Binary server is an interop server for Observability.
+//
+// See interop test case descriptions [here].
+//
+// [here]: https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
 package main
 
 import (