Comment by cstrahan

Agent is also a long established term:

https://www.eginnovations.com/blog/agentless-vs-agent-based-...

https://www.reddit.com/r/sysadmin/comments/js8h65/looking_fo...

https://www.ibm.com/docs/en/aix/7.2.0?topic=tools-performanc...

https://jolokia.org/agent/jvm.html

https://www.oracle.com/technical-resources/articles/javase/j...