diff --git a/pkg/tools/integration/web.go b/pkg/tools/integration/web.go
index 55a68a3a2..6423e7152 100644
--- a/pkg/tools/integration/web.go
+++ b/pkg/tools/integration/web.go
@@ -485,6 +485,9 @@ func (p *GeminiSearchProvider) Search(
 	count int,
 	rangeCode string,
 ) (string, error) {
+	if rangeCode != "" {
+		return "", fmt.Errorf("gemini search does not support range filter")
+	}
 	if strings.TrimSpace(p.apiKey) == "" {
 		return "", errors.New("no API key provided")
 	}
@@ -1258,7 +1261,7 @@ var (
 		"glm_search",
 		"baidu_search",
 	}
-	autoPrimaryWebSearchProviders  = []string{"gemini", "perplexity", "brave", "searxng", "tavily"}
+	autoPrimaryWebSearchProviders  = []string{"perplexity", "brave", "searxng", "tavily", "gemini"}
 	autoFallbackWebSearchProviders = []string{"baidu_search", "glm_search"}
 )
 
diff --git a/pkg/tools/integration/web_test.go b/pkg/tools/integration/web_test.go
index 7d2fc34c0..6ccf98a08 100644
--- a/pkg/tools/integration/web_test.go
+++ b/pkg/tools/integration/web_test.go
@@ -1959,6 +1959,22 @@ func TestGeminiSearchProvider_SearchSuccess(t *testing.T) {
 	}
 }
 
+func TestGeminiSearchProvider_SearchRejectsRange(t *testing.T) {
+	provider := &GeminiSearchProvider{
+		apiKey: "google-key",
+		model:  "gemini-2.5-flash",
+		client: http.DefaultClient,
+	}
+
+	_, err := provider.Search(context.Background(), "robotics", 2, "d")
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	if !strings.Contains(err.Error(), "does not support range") {
+		t.Fatalf("unexpected error: %v", err)
+	}
+}
+
 func TestGeminiSearchProvider_SearchAPIError(t *testing.T) {
 	provider := &GeminiSearchProvider{
 		apiKey: "google-key",