Update app.py

app.py

@@ -56,14 +56,12 @@ async def capture_screenshot():
         print("Screenshot saved!")
         
 @tool
-def grab_image():
+def grab_image(): -> image:
     """
     Fetches an op art image from a p5.js sketch.
     This function sends uses Playwright to launch a headless server and grab a screenshot of a p5.js sketch.
-
     Returns:
-        Returns:
-        image: the screen shot of the p5.js sketch as an image
+        image: The screen shot of the p5.js sketch as an image.
     """
     print("Running async Playwright screenshot...")