Update app.py

app.py

@@ -9,20 +9,27 @@ from tools.final_answer import FinalAnswerTool
 from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
+
 @tool
-def get_last_prices(ticker:str)-> str: #it's import to specify the return type
-    #Keep this format for the description / args / args description but feel free to modify the tool
+def get_last_prices(ticker: str) -> str:
     """
+    Fetches the most recent closing price for the specified stock ticker from Yahoo Finance.
+
+    Args:
+        ticker (str): The stock symbol for which the last closing price is required (e.g., 'AAPL' for Apple).
+
+    Returns:
+        str: The most recent closing price of the stock as a string.
     """
     stock = yf.Ticker(ticker)
 
-    df = stock.history(period ="1d", interval = "1m")
+    # Retrieve intraday data for the current day at one-minute intervals
+    df = stock.history(period="1d", interval="1m")
 
     if df.empty:
-        raise ValueError(f'Nessun dato disponibile per il ticker')
+        raise ValueError("No data available for the specified ticker.")
 
     last_price = df['Close'].iloc[-1]
-    
     return str(last_price)
 
 @tool