Update app.py

app.py

@@ -9,19 +9,24 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def count_letter(arg1: str, arg2: str) -> str:
-    """Counts how many times a specific letter appears in a given text.
+def most_common_letter(text: str, _: str) -> str:
+    """Finds the most common alphabet letter in the given text (case-insensitive).
     Args:
-        arg1: The input text to search.
-        arg2: The letter to count (e.g., 'a').
+        text: The input text to analyze.
+        _: Unused second argument.
     """
-    try:
-        if len(arg2) != 1 or not arg2.isalpha():
-            return "Error: arg2 must be a single alphabet letter."
-        count = arg1.count(arg2)
-        return f"The letter '{arg2}' appears {count} time(s) in the text."
-    except Exception as e:
-        return f"Error: {str(e)}"
+    text = text.lower()
+    frequency = {}
+    
+    for char in text:
+        if 'a' <= char <= 'z':
+            frequency[char] = frequency.get(char, 0) + 1
+
+    if not frequency:
+        return "No alphabet letters found in the input."
+
+    most_common = max(frequency.items(), key=lambda x: x[1])
+    return f"The most common letter is '{most_common[0]}' which appears {most_common[1]} time(s)."
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: