diff --git a/google/cloud/aiplatform/v1beta1/reasoning_engine.proto b/google/cloud/aiplatform/v1beta1/reasoning_engine.proto
index 38e65b3511e44..96b97b7c0fd15 100644
--- a/google/cloud/aiplatform/v1beta1/reasoning_engine.proto
+++ b/google/cloud/aiplatform/v1beta1/reasoning_engine.proto
@@ -56,7 +56,8 @@ message ReasoningEngineSpec {
       [(google.api.field_behavior) = OPTIONAL];
 }
 
-// ReasoningEngine provides customized orchestration over extensions and tools.
+// ReasoningEngine provides a customizable runtime for models to determine
+// which actions to take and in which order.
 message ReasoningEngine {
   option (google.api.resource) = {
     type: "aiplatform.googleapis.com/ReasoningEngine"