diff --git a/src/backend/src/services/ai/utils/Messages.js b/src/backend/src/services/ai/utils/Messages.js
index 43db30779..677a98b68 100644
--- a/src/backend/src/services/ai/utils/Messages.js
+++ b/src/backend/src/services/ai/utils/Messages.js
@@ -40,7 +40,7 @@ export const normalize_single_message = (message, params = {}) => {
                 });
             }
             delete message.tool_calls;
-        } else {
+        } else if ( !message.role === 'tool' ) {
             throw new Error('each message must have a \'content\' property');
         }
     }