At this time ONLY the items in the configuration - https://github.com/chucknorris/roundhouse/wiki/ConfigurationOptions
Note the full name of the option when using token replacement:
-d, --db, --database, --databasename=VALUE | REQUIRED: DatabaseName - The database you want to create/migrate. -c, --cs, --connstring, --connectionstring=VALUE | REQUIRED: ConnectionString - As an alternative to ServerName and Database - You can provide an entire connection string instead.
It's the bolded name, e.g. "{{DatabaseName}}" or "{{ConnectionString}}" from the examples above.