diff --git a/google/cloud/geminidataanalytics/v1beta/agent_context.proto b/google/cloud/geminidataanalytics/v1beta/agent_context.proto
index 61b925a251..72d0199bf7 100644
--- a/google/cloud/geminidataanalytics/v1beta/agent_context.proto
+++ b/google/cloud/geminidataanalytics/v1beta/agent_context.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/context.proto b/google/cloud/geminidataanalytics/v1beta/context.proto
index d2b586e690..9dff5b1b88 100644
--- a/google/cloud/geminidataanalytics/v1beta/context.proto
+++ b/google/cloud/geminidataanalytics/v1beta/context.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/conversation.proto b/google/cloud/geminidataanalytics/v1beta/conversation.proto
index 4f40811b22..48dd71f26f 100644
--- a/google/cloud/geminidataanalytics/v1beta/conversation.proto
+++ b/google/cloud/geminidataanalytics/v1beta/conversation.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/credentials.proto b/google/cloud/geminidataanalytics/v1beta/credentials.proto
index bb214f5d5c..9bc9c7a38f 100644
--- a/google/cloud/geminidataanalytics/v1beta/credentials.proto
+++ b/google/cloud/geminidataanalytics/v1beta/credentials.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/data_agent.proto b/google/cloud/geminidataanalytics/v1beta/data_agent.proto
index 01e413257a..d7b69e88aa 100644
--- a/google/cloud/geminidataanalytics/v1beta/data_agent.proto
+++ b/google/cloud/geminidataanalytics/v1beta/data_agent.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/data_agent_service.proto b/google/cloud/geminidataanalytics/v1beta/data_agent_service.proto
index e53d4cabd3..be4f1c7738 100644
--- a/google/cloud/geminidataanalytics/v1beta/data_agent_service.proto
+++ b/google/cloud/geminidataanalytics/v1beta/data_agent_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -83,6 +83,15 @@ service DataAgentService {
     };
   }
 
+  // Creates a new DataAgent in a given project and location synchronously.
+  rpc CreateDataAgentSync(CreateDataAgentRequest) returns (DataAgent) {
+    option (google.api.http) = {
+      post: "/v1beta/{parent=projects/*/locations/*}/dataAgents:createSync"
+      body: "data_agent"
+    };
+    option (google.api.method_signature) = "parent,data_agent,data_agent_id";
+  }
+
   // Updates the parameters of a single DataAgent.
   rpc UpdateDataAgent(UpdateDataAgentRequest)
       returns (google.longrunning.Operation) {
@@ -97,6 +106,15 @@ service DataAgentService {
     };
   }
 
+  // Updates the parameters of a single DataAgent synchronously.
+  rpc UpdateDataAgentSync(UpdateDataAgentRequest) returns (DataAgent) {
+    option (google.api.http) = {
+      patch: "/v1beta/{data_agent.name=projects/*/locations/*/dataAgents/*}:updateSync"
+      body: "data_agent"
+    };
+    option (google.api.method_signature) = "data_agent,update_mask";
+  }
+
   // Deletes a single DataAgent.
   rpc DeleteDataAgent(DeleteDataAgentRequest)
       returns (google.longrunning.Operation) {
@@ -110,6 +128,15 @@ service DataAgentService {
     };
   }
 
+  // Deletes a single DataAgent synchronously.
+  rpc DeleteDataAgentSync(DeleteDataAgentRequest)
+      returns (google.protobuf.Empty) {
+    option (google.api.http) = {
+      delete: "/v1beta/{name=projects/*/locations/*/dataAgents/*}:deleteSync"
+    };
+    option (google.api.method_signature) = "name";
+  }
+
   // Gets the IAM policy for DataAgent
   rpc GetIamPolicy(google.iam.v1.GetIamPolicyRequest)
       returns (google.iam.v1.Policy) {
diff --git a/google/cloud/geminidataanalytics/v1beta/data_analytics_agent.proto b/google/cloud/geminidataanalytics/v1beta/data_analytics_agent.proto
index 78efe3bd32..8398553cdc 100644
--- a/google/cloud/geminidataanalytics/v1beta/data_analytics_agent.proto
+++ b/google/cloud/geminidataanalytics/v1beta/data_analytics_agent.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/data_chat_service.proto b/google/cloud/geminidataanalytics/v1beta/data_chat_service.proto
index 66916ef330..0502a6ebea 100644
--- a/google/cloud/geminidataanalytics/v1beta/data_chat_service.proto
+++ b/google/cloud/geminidataanalytics/v1beta/data_chat_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/google/cloud/geminidataanalytics/v1beta/datasource.proto b/google/cloud/geminidataanalytics/v1beta/datasource.proto
index 62d9a0c53e..5108406448 100644
--- a/google/cloud/geminidataanalytics/v1beta/datasource.proto
+++ b/google/cloud/geminidataanalytics/v1beta/datasource.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.