diff --git a/vision_agent/tools/tools.py b/vision_agent/tools/tools.py
index 5973af58..3bf2bfbf 100644
--- a/vision_agent/tools/tools.py
+++ b/vision_agent/tools/tools.py
@@ -639,7 +639,7 @@ class VisualQuestionAnswering(Tool):
         ],
     }
 
-    def __call__(self, image: str, prompt: str) -> Dict
+    def __call__(self, image: str, prompt: str) -> Dict:
         """Invoke the visual question answering model.
 
         Parameters: