diff --git a/src/llama_stack_client/lib/agents/client_tool.py b/src/llama_stack_client/lib/agents/client_tool.py
index 71da2b6b..0d15dade 100644
--- a/src/llama_stack_client/lib/agents/client_tool.py
+++ b/src/llama_stack_client/lib/agents/client_tool.py
@@ -197,8 +197,7 @@ def get_params_definition(self) -> Dict[str, Parameter]:
                 params[name] = Parameter(
                     name=name,
                     description=param_doc or f"Parameter {name}",
-                    # Hack: litellm/openai expects "string" for str type
-                    parameter_type=type_hint.__name__ if type_hint.__name__ != "str" else "string",
+                    parameter_type=type_hint.__name__,
                     default=(param.default if param.default != inspect.Parameter.empty else None),
                     required=is_required,
                 )