The section [1] describing the global default status configuration of MP Health is missing important information.
At the moment the reader can learn how to read attribute values for global health readiness and liveness initial status but no guidance is provided about the exiting chance for the same attributes to be written, e.g.:

/subsystem=microprofile-health-smallrye:write-attribute(name=empty-readiness-checks-status,value=DOWN)
{
    "outcome" => "success",
    "response-headers" => {
        "operation-requires-reload" => true,
        "process-state" => "reload-required"
    }
}

:reload

Beside the missing piece of information, this can result in misleading guidance for the end user who could think that this is a read-only attribute and its value can only be set via a previously defined environment variable.

[1]
https://doc-stage.usersys.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html-single/configuration_guide/index#global_statuses_undefined_probes