Update app.py

app.py

@@ -13,8 +13,9 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 class CalculatorTool(Tool):
     name = "calculator"
     description = "Performs mathematical calculations"
-    inputs = {"expression": {"type": "text"}}  # Changed to dict
-    outputs = {"result": {"type": "text"}}     # Changed to dict
+    inputs = {"expression": {"type": "text"}}
+    outputs = {"result": {"type": "text"}}
+    output_type = "text"  # Added required attribute
     
     def __call__(self, expression: str) -> str:
         try:
@@ -25,8 +26,9 @@ class CalculatorTool(Tool):
 class TimeTool(Tool):
     name = "current_time"
     description = "Gets current UTC time"
-    inputs = {}  # Empty dict for no inputs
-    outputs = {"time": {"type": "text"}}  # Changed to dict
+    inputs = {}
+    outputs = {"time": {"type": "text"}}
+    output_type = "text"  # Added required attribute
     
     def __call__(self) -> str:
         return datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S UTC")