Update the fibonachi function

app.py

@@ -8,16 +8,15 @@ from tools.final_answer import FinalAnswerTool
 from Gradio_UI import GradioUI
 
 @tool
-def fibonacci(arg1:str) -> str:
+def fibonacci(position:int) -> int:
     """A tool that get a position n, and tell you the Fibonacci number at that position in the sequence. 
     Args:
-        arg1: the position
+        position: the position
     """
-    number = int(n)
     a, b = 0, 1
-    for _ in range(number):
+    for _ in range(position):
         a, b = b, a + b
-    return str(a)
+    return a
     
 
 @tool