chore: add google search agent for testing

PiperOrigin-RevId: 762571269

Author: abchang123

contributing/samples/google_search_agent/__init__.py

@@ -0,0 +1,15 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from . import agent

contributing/samples/google_search_agent/agent.py

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+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from google.genai import Client
+
+from google.adk import Agent
+from google.adk.tools import google_search
+
+# Only Vertex AI supports image generation for now.
+client = Client()
+
+root_agent = Agent(
+    model='gemini-2.0-flash-001',
+    name='root_agent',
+    description="""an agent whose job it is to perform Google search queries and answer questions about the results.""",
+    instruction="""You are an agent whose job is to perform Google search queries and answer questions about the results.
+""",
+    tools=[google_search],
+)