fix: do not include reserved params in specs

backend/utils/tools.py

@@ -59,7 +59,10 @@ def get_tools_specs(tools) -> List[dict]:
                         for param_name, param_annotation in get_type_hints(
                             function
                         ).items()
-                        if param_name != "return" and param_name != "__user__"
+                        if param_name != "return"
+                        and not (
+                            param_name.startswith("__") and param_name.endswith("__")
+                        )
                     },
                     "required": [
                         name