My apologies, I worded my question incorrectly. Is there a way to see which of those metrics is actually turned on? I have the list of metrics, but when I collect some, no data is returned. For example, if I try to collect 'builtin:host.disk.(readTime)', I get no data back, so I assume its not enabled.
have you considered using the metric browser with the filter option for "metric last reported":
This option is also available via API and the WrittenSince Parameter:
Both will give you a list of metrics, that are actively reported after the provided timestamp.