Update app.py

app.py

@@ -108,7 +108,7 @@ def respond(
     
     if not arguments:
         arguments = "{}"
-    elif arguments.strip()[-1] == "}}":
+    elif arguments.strip()[:-1].strip() == "}":
         arguments = arguments.strip()[:-1]
     if name:
         result = f"💥 Error using tool {name}, tools doesn't exists"