diff --git a/core/src/main/java/com/google/adk/tools/GoogleSearchTool.java b/core/src/main/java/com/google/adk/tools/GoogleSearchTool.java
index 6f89754cf..8518dc745 100644
--- a/core/src/main/java/com/google/adk/tools/GoogleSearchTool.java
+++ b/core/src/main/java/com/google/adk/tools/GoogleSearchTool.java
@@ -20,7 +20,6 @@
 import com.google.common.collect.ImmutableList;
 import com.google.genai.types.GenerateContentConfig;
 import com.google.genai.types.GoogleSearch;
-import com.google.genai.types.GoogleSearchRetrieval;
 import com.google.genai.types.Tool;
 import io.reactivex.rxjava3.core.Completable;
 import java.util.List;
@@ -66,17 +65,7 @@ public Completable processLlmRequest(
     updatedToolsBuilder.addAll(existingTools);
 
     String model = llmRequestBuilder.build().model().get();
-    if (model != null && model.startsWith("gemini-1")) {
-      if (!updatedToolsBuilder.build().isEmpty()) {
-        logger.error("Tools already present: {}", configBuilder.build().tools().get());
-        return Completable.error(
-            new IllegalArgumentException(
-                "Google search tool cannot be used with other tools in Gemini 1.x."));
-      }
-      updatedToolsBuilder.add(
-          Tool.builder().googleSearchRetrieval(GoogleSearchRetrieval.builder().build()).build());
-      configBuilder.tools(updatedToolsBuilder.build());
-    } else if (model != null && (model.startsWith("gemini-2") || model.startsWith("gemini-3"))) {
+    if (model != null && (model.startsWith("gemini-2") || model.startsWith("gemini-3"))) {
 
       updatedToolsBuilder.add(Tool.builder().googleSearch(GoogleSearch.builder().build()).build());
       configBuilder.tools(updatedToolsBuilder.build());
diff --git a/core/src/test/java/com/google/adk/tools/BaseToolTest.java b/core/src/test/java/com/google/adk/tools/BaseToolTest.java
index dde1d73ea..620bba5c0 100644
--- a/core/src/test/java/com/google/adk/tools/BaseToolTest.java
+++ b/core/src/test/java/com/google/adk/tools/BaseToolTest.java
@@ -7,7 +7,6 @@
 import com.google.genai.types.FunctionDeclaration;
 import com.google.genai.types.GenerateContentConfig;
 import com.google.genai.types.GoogleSearch;
-import com.google.genai.types.GoogleSearchRetrieval;
 import com.google.genai.types.Tool;
 import com.google.genai.types.ToolCodeExecution;
 import com.google.genai.types.UrlContext;
@@ -142,25 +141,6 @@ public void processLlmRequestWithGoogleSearchToolAddsToolToConfig() {
             Tool.builder().googleSearch(GoogleSearch.builder().build()).build());
   }
 
-  @Test
-  public void processLlmRequestWithGoogleSearchRetrievalToolAddsToolToConfig() {
-    GoogleSearchTool googleSearchTool = new GoogleSearchTool();
-    LlmRequest llmRequest =
-        LlmRequest.builder()
-            .config(GenerateContentConfig.builder().build())
-            .model("gemini-1")
-            .build();
-    LlmRequest.Builder llmRequestBuilder = llmRequest.toBuilder();
-    Completable unused =
-        googleSearchTool.processLlmRequest(llmRequestBuilder, /* toolContext= */ null);
-    LlmRequest updatedLlmRequest = llmRequestBuilder.build();
-    assertThat(updatedLlmRequest.config()).isPresent();
-    assertThat(updatedLlmRequest.config().get().tools()).isPresent();
-    assertThat(updatedLlmRequest.config().get().tools().get())
-        .containsExactly(
-            Tool.builder().googleSearchRetrieval(GoogleSearchRetrieval.builder().build()).build());
-  }
-
   @Test
   public void processLlmRequestWithUrlContextToolAddsToolToConfig() {
     FunctionDeclaration functionDeclaration =