{
  "$id": "https://example.com/person.schema.json",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Person",
  "type": "object",
  "properties": {
    "firstName": {
      "type": "string",
      "description": "The person's first name."
    },
    "foo": {
      "type": "array",
      "maxItems": 3
    }
  },
  "message": {
    "maxItems" : "MaxItem must be 3 only",
    "type" : "Invalid type"
  }
}