diff --git a/codex-rs/rollout/src/persistence_metrics.rs b/codex-rs/rollout/src/persistence_metrics.rs
index 911186f68..c851ea624 100644
--- a/codex-rs/rollout/src/persistence_metrics.rs
+++ b/codex-rs/rollout/src/persistence_metrics.rs
@@ -255,7 +255,6 @@ fn turn_item_type(item: &TurnItem) -> &'static str {
 
 fn response_item_type(item: &ResponseItem) -> &'static str {
     match item {
-        ResponseItem::AdditionalTools { .. } => "response.additional_tools",
         ResponseItem::Message { .. } => "response.message",
         ResponseItem::AdditionalTools { .. } => "response.additional_tools",
         ResponseItem::AgentMessage { .. } => "response.agent_message",