@Vidula Khanna​ We can add custom values to the job clusters as well. When you create the job task, click on edit cluster details which will take you to the cluster configuration where you can add the custom tags. In case of Tableau queries, it would be ODBC queries on which we can't customize the cluster configurations. The ODBC/JDBC queries will be run on existing clusters, so add the custom tags to these clusters.

https://docs.databricks.com/workflows/jobs/jobs-quickstart.html#create-a-job