What is DescribeEventAggregates used for?

I’ve noticed that when deploying my serverless project that it runs a request for DescribeEventAggregates which is part of AWS Health; however I don’t quite know or understand what it’s purpose is for when deploying serverless.

Does anyone know why DescribeEventAggregates gets requested?

Also; why is DescribeVPC being requested when I’m not specifying a vpc to be provisioned in the serverless.yml file. I am provisioning an api gateway however in EDGE; but not in a VPC.