enh/fix: update extra params for native function calling

Co-Authored-By: Jacob Leksan <63938553+jmleksan@users.noreply.github.com>

backend/open_webui/utils/tools.py

@@ -85,9 +85,26 @@ def get_async_tool_function_and_apply_extra_params(
     update_wrapper(new_function, function)
     new_function.__signature__ = new_sig
 
+    new_function.__function__ = function  # type: ignore
+    new_function.__extra_params__ = extra_params  # type: ignore
+
     return new_function
 
 
+async def get_updated_tool_function(function: Callable, extra_params: dict):
+    # Get the original function and merge updated params
+    __function__ = getattr(function, "__function__", None)
+    __extra_params__ = getattr(function, "__extra_params__", None)
+
+    if __function__ is not None and __extra_params__ is not None:
+        return await get_async_tool_function_and_apply_extra_params(
+            __function__,
+            {**__extra_params__, **extra_params},
+        )
+
+    return function
+
+
 async def get_tools(
     request: Request, tool_ids: list[str], user: UserModel, extra_params: dict
 ) -> dict[str, dict]: