Fix mcp

app.py

@@ -1,16 +1,23 @@
 import gradio as gr
 
-def convert_temperature(temp, unit):
+def convert_temperature(temp: str, unit: str) -> tuple[str, str, str]:
     """
-    Convert a temperature value between Celsius, Fahrenheit, and Kelvin.
+    Converts a temperature value from one unit to Celsius, Fahrenheit, and Kelvin.
+
+    This function takes a temperature value as a string and its unit, performs the conversion, and returns the equivalent temperatures in all three units as formatted strings. Designed for use in a Gradio interface and as an MCP tool.
 
     Args:
-        temp (str or float): The temperature value to convert.
-        unit (str): The unit of the input temperature ('Celsius', 'Fahrenheit', or 'Kelvin').
+        temp (str): The temperature value as a string (e.g., '25', '-10.5'). Must be convertible to a float.
+        unit (str): The unit of the input temperature. Must be one of 'Celsius', 'Fahrenheit', or 'Kelvin'.
 
     Returns:
-        tuple: A tuple containing three strings with the temperature in Celsius, Fahrenheit, and Kelvin,
-               formatted to two decimal places. If input is invalid, returns an error message.
+        tuple[str, str, str]: A tuple containing three strings:
+            - Temperature in Celsius (e.g., '25.00 °C') or 'Invalid' if input is invalid.
+            - Temperature in Fahrenheit (e.g., '77.00 °F') or 'Invalid' if input is invalid.
+            - Temperature in Kelvin (e.g., '298.15 K') or 'Invalid' if input is invalid.
+
+    Raises:
+        ValueError: If the temp input cannot be converted to a float.
     """
     try:
         temp = float(temp)
@@ -29,7 +36,7 @@ def convert_temperature(temp, unit):
         
         return (f"{celsius:.2f} °C", f"{fahrenheit:.2f} °F", f"{kelvin:.2f} K")
     except ValueError:
-        return "Please enter a valid number"
+        return ("Invalid", "Invalid", "Invalid")
 
 # Define the Gradio interface
 with gr.Blocks() as app:
@@ -51,8 +58,9 @@ with gr.Blocks() as app:
     convert_button.click(
         fn=convert_temperature,
         inputs=[temp_input, unit_dropdown],
-        outputs=[celsius_output, fahrenheit_output, kelvin_output]
+        outputs=[celsius_output, fahrenheit_output, kelvin_output],
+        api_name="/convert_temperature"
     )
 
-# Launch the app with MCP setting
+# Launch the app with MCP server enabled
 app.launch(mcp_server=True)