ActiveMQ for caching invalidation messages using JMS for SDL Tridion sites 9.1

This question is opened to confirm the understanding and to gain more insight on ActiveMQ for caching Invalidation(JMS Cache Implementation).

Please find the steps followed to configure the caching Invalidation using JMS

1. JndiContext is added to cd_storage_conf.XML for two of the services i.e DEPLOYER and CONTENT
2. Logback.xml to configure log on both the services as mentioned in step 1
3. Checked on the ActiveMQ folder for JAR files for the two services
4. Checked on the invalidation message in the trace log.

My Queries

Will the DISCOVERY service also need JndiContext setting?