Terraform Validator is not an officially supported Google product; it is a library for conversion of Terraform plan data to CAI Assets.
gcloud beta terraform vet is a tool for enforcing policy compliance as part of an infrastructure CI/CD pipeline. It is in Public Preview. It uses Terraform Validator and provides additional functionality.
If you have been using terraform-validator directly in the past, we recommend migrating to gcloud beta terraform vet.
This is not an officially supported Google product.