Additional details:  It would be good if Fivetran could allow users to specify snowfake tags for columns.  Ideally Fivetran would apply the tags to the columns when it creates the destination table.  If that's difficult, I'd still be very helpul Fivetran could apply tags in a transformation, so columns would be tagged in Quickstart views not in underlying tables.

 Snowflake would then automatically apply masking policies based on the tags. This would be great for PHI.