feat: Add an enterprise web search tool for web grounding.

PiperOrigin-RevId: 758206509

src/google/adk/tools/enterprise_search_tool.py

@@ -0,0 +1,65 @@
+# 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 __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from google.genai import types
+from typing_extensions import override
+
+from .base_tool import BaseTool
+from .tool_context import ToolContext
+
+if TYPE_CHECKING:
+  from ..models import LlmRequest
+
+
+class EnterpriseWebSearchTool(BaseTool):
+  """A Gemini 2+ built-in tool using web grounding for Enterprise compliance.
+
+  See the documentation for more details:
+  https://cloud.google.com/vertex-ai/generative-ai/docs/grounding/web-grounding-enterprise.
+  """
+
+  def __init__(self):
+    """Initializes the Vertex AI Search tool."""
+    # Name and description are not used because this is a model built-in tool.
+    super().__init__(
+        name='enterprise_web_search', description='enterprise_web_search'
+    )
+
+  @override
+  async def process_llm_request(
+      self,
+      *,
+      tool_context: ToolContext,
+      llm_request: LlmRequest,
+  ) -> None:
+    if llm_request.model and llm_request.model.startswith('gemini-'):
+      if llm_request.model.startswith('gemini-1') and llm_request.config.tools:
+        raise ValueError(
+            'Enterprise web search tool can not be used with other tools in'
+            ' Gemini 1.x.'
+        )
+      llm_request.config = llm_request.config or types.GenerateContentConfig()
+      llm_request.config.tools = llm_request.config.tools or []
+      llm_request.config.tools.append(
+          types.Tool(enterprise_web_search=types.EnterpriseWebSearch())
+      )
+    else:
+      raise ValueError(
+          'Enterprise web search tool is not supported for model'
+          f' {llm_request.model}'
+      )