docs: recommend AnalyzeContent for future users

PiperOrigin-RevId: 401877120

google/cloud/dialogflow/v2beta1/session.proto

@@ -62,6 +62,13 @@ service Sessions {
   // and session entity types to be updated, which in turn might affect
   // results of future queries.
   //
+  // If you might use
+  // [Agent Assist](https://cloud.google.com/dialogflow/docs/#aa)
+  // or other CCAI products now or in the future, consider using
+  // [AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent]
+  // instead of `DetectIntent`. `AnalyzeContent` has additional
+  // functionality for Agent Assist and other CCAI products.
+  //
   // Note: Always use agent versions for production traffic.
   // See [Versions and
   // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
@@ -89,6 +96,13 @@ service Sessions {
   // and returns structured, actionable data as a result. This method is only
   // available via the gRPC API (not REST).
   //
+  // If you might use
+  // [Agent Assist](https://cloud.google.com/dialogflow/docs/#aa)
+  // or other CCAI products now or in the future, consider using
+  // [StreamingAnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.StreamingAnalyzeContent]
+  // instead of `StreamingDetectIntent`. `StreamingAnalyzeContent` has
+  // additional functionality for Agent Assist and other CCAI products.
+  //
   // Note: Always use agent versions for production traffic.
   // See [Versions and
   // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).