When writing scripts, always leave a file header about what the script does, or link to a proper resource.
Add context on:
How this script is used
Why this script is needed
How to run this script
Generally standalone scripts may leave out a lot of context.
Example of a decent script:
!/bin/sh# Reencrypts the keys in our database.# This is necessary because ....# http://www.example.com/wiki/details