Validation of complex variables in terraform

main.tf

# terraform.vars
rules = [
  {
    api_groups = [""]
    resources = ["pods","services","deployments","jobs"]
    verbs      = ["*"]
  },
  {
    api_groups = [""]
    resources = ["namespaces"]
    verbs      = ["get", "watch", "list"]
  }
]

# variables.tf
variable "rules" {
  type = list(object({
    api_groups = list(string)
    resources = list(string)
    verbs = list(string)
  }))
}

# main.tf
resource "kubernetes_cluster_role" "this" {
  metadata {
    name = "${var.app}"

    labels = {
      k8s-addon = "${var.app}.addons.k8s.io"
      k8s-app   = "${var.app}"
    }
  }

  dynamic "rule" {
    for_each = var.rules
    content {
      api_groups = rule.value["api_groups"]
      resources  = rule.value["resources"]
      verbs      = rule.value["verbs"]
    }
  }
}

If incorrect variables are provided:

 Error: Invalid value for input variable
│ 
│   on terraform.tfvars line 6:
│    6: rules = [
│    7:   {
│    8:     api_groups = [""]
│    9:     resources = ["pods","services","deployments","jobs"]
│   10:     verbs      = ["*"]
│   11:   },
│   12:   {
│   13:     api_groups = [""]
│   14:     resources = ["namespaces"]
│   15:     verb      = ["get", "watch", "list"]
│   16:   }
│   17: ]
│ 
│ The given value is not valid for variable "rules": element 1: attribute "verbs" is required.
╵
╷
│ Error: Incorrect variable type
│ 
│   on variables.tf line 17:
│   17: variable "rules" {
│ 
│ The resolved value of variable "rules" is not appropriate: element 1: attribute "verbs" is required