diff --git a/src/function/mod.rs b/src/function/mod.rs
index f9f230c..4d86e53 100644
--- a/src/function/mod.rs
+++ b/src/function/mod.rs
@@ -1064,7 +1064,7 @@ impl ToolCall {
                         function_name.clone(),
                         function_name,
                         vec![],
-                        Default::default(),
+                        agent.variable_envs(),
                     ))
                 }
             }