input: from typing import List
  
  def explain_list_tuple_difference(description: str) -> str:
      """
      Input: A string description of a task that explains the difference between a list and a tuple in Python.
      Output: A string that succinctly summarizes the difference, mentioning mutability and the type of brackets used for each.
  
      Example:
      >>> explain_list_tuple_difference("Explain the difference between a list and a tuple in Python.")
      'The difference between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed. A list has square brackets around it, while a tuple has parentheses around it.'
      """
output:     if "list" in description and "tuple" in description:
          return "The difference between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed. A list has square brackets around it, while a tuple has parentheses around it."
      else:
          return "The input description does not mention both lists and tuples."