Datadog Agent 5.1.0 introduces new options for tagging metrics collected by the JMX integration, allowing users to assign custom tags to each metric and break free from the limitations imposed by MBean developers. This feature was made possible through a pull request from Keen.io customer Cory Watson, who had a need to enumerate each column's family's metrics as separate JMX queries in his Cassandra environment. The updated jmxfetch code was deployed as part of the Datadog Agent 5.1, providing better support for JMX in Datadog and enabling users to create more descriptive tags, such as internal application names. To take advantage of this feature, users can upgrade to Datadog Agent 5.1 by following the instructions provided or sign up for a free trial to experience it firsthand.