SQL Data Catalog provides a jumping-off point for your Data Masking needs. Once you have classified a database with information types and added a Static masking treatment intent, Catalog presents you with "mapping files" that you can open directly in Masker (requires version 7.1.22 or higher).

Once you have downloaded a mapping file, simply double-clicking on it will open Data Masker, which will prompt you for connection details to a copy/clone of this database (as you are likely to want to classify a production database, but you want to mask/anonymize a safe version for your data analysts, or developers).