CheckSubnetNetworkAccess checks if the subnet has network access by checking routes.

GetAvailableKeyPairs returns a list of available key pairs in AWS Account.

GetVPCIDFromSubnet returns the VPC ID for a given subnet ID.

InferPortByHost finds the remote port of a service (RDS, ElastiCache, OpenSearch) by matching its endpoint hostname.

ListInstancesWithTag returns a list of EC2 instances with a specific tag.