diff --git a/libs/sdk-js/src/types.messages.ts b/libs/sdk-js/src/types.messages.ts
index a2eb34a9a..62f2e6d5d 100644
--- a/libs/sdk-js/src/types.messages.ts
+++ b/libs/sdk-js/src/types.messages.ts
@@ -26,7 +26,7 @@ export type AIMessage = {
   tool_calls?:
     | {
         name: string;
-        args: { [x: string]: { [x: string]: any } };
+        args: { [x: string]: any };
         id?: string | undefined;
         type?: "tool_call" | undefined;
       }[]