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George WealeandCopybara-Service
eaf50ce37e
Co-authored-by: George Weale <gweale@google.com> PiperOrigin-RevId: 872503435
66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
# Copyright 2026 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import annotations
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from typing import TYPE_CHECKING
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from google.genai import types
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from typing_extensions import override
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from ..utils.model_name_utils import is_gemini_1_model
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from ..utils.model_name_utils import is_gemini_2_or_above
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from ..utils.model_name_utils import is_gemini_model_id_check_disabled
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from .base_tool import BaseTool
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from .tool_context import ToolContext
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if TYPE_CHECKING:
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from ..models import LlmRequest
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class UrlContextTool(BaseTool):
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"""A built-in tool that is automatically invoked by Gemini 2 models to retrieve content from the URLs and use that content to inform and shape its response.
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This tool operates internally within the model and does not require or perform
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local code execution.
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"""
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def __init__(self):
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# Name and description are not used because this is a model built-in tool.
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super().__init__(name='url_context', description='url_context')
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@override
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async def process_llm_request(
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self,
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*,
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tool_context: ToolContext,
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llm_request: LlmRequest,
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) -> None:
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model_check_disabled = is_gemini_model_id_check_disabled()
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llm_request.config = llm_request.config or types.GenerateContentConfig()
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llm_request.config.tools = llm_request.config.tools or []
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if is_gemini_1_model(llm_request.model):
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raise ValueError('Url context tool cannot be used in Gemini 1.x.')
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elif is_gemini_2_or_above(llm_request.model) or model_check_disabled:
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llm_request.config.tools.append(
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types.Tool(url_context=types.UrlContext())
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)
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else:
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raise ValueError(
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f'Url context tool is not supported for model {llm_request.model}'
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)
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url_context = UrlContextTool()
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