Add __call__ method to Tool

Author: rjambrecic

autogen/tools/tool.py

@@ -70,3 +70,16 @@ def register_for_execution(self, agent: "ConversableAgent") -> None:
             agent (ConversableAgent): The agent to which the tool will be registered.
         """
         agent.register_for_execution()(self)
+
+    def __call__(self, *args: Any, **kwargs: Any) -> Any:
+        """
+        Execute the tool by calling its underlying function with the provided arguments.
+
+        Args:
+            *args: Positional arguments to pass to the tool
+            **kwargs: Keyword arguments to pass to the tool
+
+        Returns:
+            The result of executing the tool's function.
+        """
+        return self._func(*args, **kwargs)

test/tools/test_tool.py

@@ -57,3 +57,6 @@ def test_register_for_execution(self) -> None:
         self.tool.register_for_execution(user_proxy)
         assert user_proxy.can_execute_function("test_tool")
         assert user_proxy.function_map["test_tool"]("Hello") == "Hello!"
+
+    def test__call__(self) -> None:
+        assert self.tool("Hello") == "Hello!"