Policy description field length not validated

Steps to reproduce:

1. Clean install in D7 and Password Policy
2. Add a new policy
3. Enter the following as a description:
4. Your password is case-sensitive must include uppercase, lowercase numbers and symbols. It can be up to 128 characters long. It must be at least 8 characters and must include at least: 2 Numbers 2 Uppercase 2 Symbols It cannot contain your username.
5. Click save

Admin UI shows: The website encountered an unexpected error. Please try again later.
Watchdog shows: PDOException: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'description' at row 1: UPDATE {password_policy} SET name=:db_update_placeholder_0, description=:db_update_placeholder_1, policy=:db_update_placeholder_2, expiration=:db_update_placeholder_3, warning=:db_update_placeholder_4 WHERE (pid = :db_condition_placeholder_0) ; Array ( [:db_update_placeholder_0] => Complexity Policy [:db_update_placeholder_1] => Your password is case-sensitive must include uppercase, lowercase numbers and symbols. It can be up to 128 characters long. It must be at least 8 characters and must include at least: 2 Numbers 2 Uppercase 2 Symbols It cannot include: Contain your username [:db_update_placeholder_2] => a:12:{s:12:"alphanumeric";s:1:"3";s:5:"digit";s:1:"2";s:15:"digit_placement";s:1:"1";s:9:"uppercase";s:1:"2";s:11:"punctuation";s:1:"2";s:9:"lowercase";s:1:"1";s:8:"username";s:1:"1";s:5:"delay";s:2:"48";s:6:"length";s:1:"8";s:6:"letter";s:1:"3";s:7:"history";s:1:"3";s:10:"complexity";s:1:"4";} [:db_update_placeholder_3] => 0 [:db_update_placeholder_4] => [:db_condition_placeholder_0] => 1 ) in password_policy_admin_form_submit() (line 426 of [your web-root]/sites/www.example.com/modules/password_policy/password_policy.admin.inc).

This seems like a pretty straight-forward fix.
Maybe a combination of:
Adding a length validation check for the description field that matches the db field size so the error message is more intelligible.
Making description - currently varchar(255) - a bit larger, to give more flexibility to describe complex policies