By default, the Agent doesn't come with a lot of plugins, you can list all the plugins with the following command:

PS C:\App\Agent\agent_13.3.0.0.0\bin> .\emctl.bat listplugins agent -type all
Oracle Enterprise Manager Cloud Control 13c Release 3
Copyright (c) 1996, 2018 Oracle Corporation.  All rights reserved.
---------------------------------------------------------------
oracle.sysman.oh    13.3.0.0.0           C:\App\Agent\agent_13.3.0.0.0\plugins\oracle.sysman.oh.agent.plugin_13.3.0.0.0
oracle.sysman.oh    13.3.0.0.0           C:\App\Agent\agent_13.3.0.0.0\plugins\oracle.sysman.oh.discovery.plugin_13.3.0.0.0

PS C:\App\Agent\agent_13.3.0.0.0\bin>

To deploy the plugin, we have to have it enabled in the OMS. Once it is available in OMS we can deploy the plugin on the agent via the EM Web Console.

• Settings → Extensiability
• Plugins → Deploy
• Managed Agents → Choose the plugin