Agent Development Kit(ADK)

An easy-to-use and powerful framework to build AI agents.

src/google/adk/tools/long_running_tool.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 typing import Callable
+
+from .function_tool import FunctionTool
+
+
+class LongRunningFunctionTool(FunctionTool):
+  """A function tool that returns the result asynchronously.
+
+  This tool is used for long-running operations that may take a significant
+  amount of time to complete. The framework will call the function. Once the
+  function returns, the response will be returned asynchronously to the
+  framework which is identified by the function_call_id.
+
+  Example:
+  ```python
+  tool = LongRunningFunctionTool(a_long_running_function)
+  ```
+
+  Attributes:
+    is_long_running: Whether the tool is a long running operation.
+  """
+
+  def __init__(self, func: Callable):
+    super().__init__(func)
+    self.is_long_running = True