I was investigating a separate issue in the Investigator when I came across this event. I noticed that one of my agent icons looked different than normal and that it wasn't showing any metrics. I hovered my mouse over the agent and I saw the following hover text: "introscope.enterprisemanager.agent.metrics.limit is active on Agent XYZ".
I checked the CA APM Configuration and Administration Guide and it stated that the property "introscope.enterprisemanager.agent.metrics.limit" was used to configure agent clamping. Does this indicate that this agent is clamping?