diff --git a/src/agents/pi-tool-definition-adapter.ts b/src/agents/pi-tool-definition-adapter.ts
index 02dade5690c..3d4a3ca25eb 100644
--- a/src/agents/pi-tool-definition-adapter.ts
+++ b/src/agents/pi-tool-definition-adapter.ts
@@ -72,7 +72,7 @@ function splitToolExecuteArgs(args: ToolExecuteArgsAny): {
       signal,
     };
   }
-  const [toolCallId, params, onUpdate, _ctx, signal] = args as ToolExecuteArgsCurrent;
+  const [toolCallId, params, onUpdate, _ctx, signal] = args;
   return {
     toolCallId,
     params,