Turnstile server-side response properties

I notice that the Turnstile server-side response also returns two properties, not documented here and I’d like to figure out their purpose.

These are the properties:

{
messages: []
metadata: { interactive: false }
}

I was trying to link to this URL in the docs:
https://developers.cloudflare.com/turnstile/get-started/server-side-validation/#accepted-parameters