diff --git a/envoy/config/trace/v3/opentelemetry.proto b/envoy/config/trace/v3/opentelemetry.proto
index 67cfc3fe..e9c7430d 100644
--- a/envoy/config/trace/v3/opentelemetry.proto
+++ b/envoy/config/trace/v3/opentelemetry.proto
@@ -5,7 +5,6 @@ package envoy.config.trace.v3;
 import "envoy/config/core/v3/grpc_service.proto";
 
 import "udpa/annotations/status.proto";
-import "validate/validate.proto";
 
 option java_package = "io.envoyproxy.envoy.config.trace.v3";
 option java_outer_classname = "OpentelemetryProto";
@@ -20,7 +19,8 @@ option (udpa.annotations.file_status).package_version_status = ACTIVE;
 message OpenTelemetryConfig {
   // The upstream gRPC cluster that will receive OTLP traces.
   // Note that the tracer drops traces if the server does not read data fast enough.
-  core.v3.GrpcService grpc_service = 1 [(validate.rules).message = {required: true}];
+  // This field can be left empty to disable reporting traces to the collector.
+  core.v3.GrpcService grpc_service = 1;
 
   // The name for the service. This will be populated in the ResourceSpan Resource attributes.
   // If it is not provided, it will default to "unknown_service:envoy".
diff --git a/envoy/extensions/load_balancing_policies/client_side_weighted_round_robin/v3/client_side_weighted_round_robin.proto b/envoy/extensions/load_balancing_policies/client_side_weighted_round_robin/v3/client_side_weighted_round_robin.proto
index 22633aab..5becf769 100644
--- a/envoy/extensions/load_balancing_policies/client_side_weighted_round_robin/v3/client_side_weighted_round_robin.proto
+++ b/envoy/extensions/load_balancing_policies/client_side_weighted_round_robin/v3/client_side_weighted_round_robin.proto
@@ -54,6 +54,6 @@ message ClientSideWeightedRoundRobin {
   // blackout_period applies. Defaults to 3 minutes.
   google.protobuf.Duration weight_expiration_period = 4;
 
-  // How often endpoint weights are recalculated.  Default is 1 second.
+  // How often endpoint weights are recalculated. Default is 1 second.
   google.protobuf.Duration weight_update_period = 5;
 }