Update unclear how to be strict with default values

app.py

@@ -20,10 +20,10 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
 
 # Writing my first custom tool
 @tool
-def toss_a_die(k=6: int) -> int:
+def toss_a_die(k: int) -> int:
     """A tool to toss a k-sided die / dice and return the value showing on that die / dice.
     Args:
-        k=6: the number of sides on the die, defaulting to 6 sides"""
+        k=6: the number of sides on the die, defaulting to 6 sides when otherwise unspecified"""
     return 3
 
 @tool