Add a tool stub

Author: AnatoliB

samples-v2/openai_agents/tools.py

@@ -1,7 +1,22 @@
-from agents import Tool
+from typing import Any, Callable
 
+from agents import (
+    Agent,
+    RunContextWrapper,
+    Tool,
+)
+from agents.function_schema import DocstringStyle, function_schema
+from agents.tool import (
+    FunctionTool,
+    ToolErrorFunction,
+    ToolFunction,
+    ToolParams,
+    default_tool_error_function,
+    function_tool,
+)
 
-def activity_as_tool(activity_func) -> Tool:
+
+def activity_as_tool(activity_func: Callable) -> Tool:
     """
     Convert an Azure Durable Functions activity to an OpenAI Agents SDK Tool.
     
@@ -11,5 +26,25 @@ def activity_as_tool(activity_func) -> Tool:
     Returns:
         Tool: An OpenAI Agents SDK Tool object
     """
-    # TODO: Implement the conversion logic
-    raise NotImplementedError("activity_as_tool is not yet implemented")
+
+    async def run_activity(ctx: RunContextWrapper[Any], input: str) -> Any:
+        return "Weather in Tokyo: 14-20C, sunny with wind."
+
+    activity_name = activity_func._function._name
+
+    schema = function_schema(
+        func=run_activity,
+        name_override=activity_name,
+        docstring_style=None,
+        description_override=None,
+        use_docstring_info=False,
+        strict_json_schema=False,
+    )
+
+    return FunctionTool(
+        name=activity_name,
+        description="",
+        params_json_schema=schema.params_json_schema,
+        on_invoke_tool=run_activity,
+        strict_json_schema=False,
+    )