added new tool string concatator

app.py

@@ -18,6 +18,15 @@ def my_cutom_tool(arg1:str, arg2:int)-> str: #it's important to specify the retu
     """
     return "What magic will you build ?"
 
+@tool
+def string_concatinator(string1: str, string2: str) > str:
+    """ A tool that concats given 2 strings
+    Args:
+        string1: First string
+        string2: second string
+    """
+    return string1 + string2;
+
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.