EntityDefinition A custom object Name must be in english and PascalCase Field: QualifiedApiName Regex: ^[A-Z][A-Za-z0-9]*(__c|__mdt|__ka|__kav)$ Example InsurancePolicy A custom object Description is required Field: Description Regex: ^.{10,}$ Example More than 10 chars Less than 100 custom fields Field: Fields.totalSize Maximum one custom trigger per object Field: ApexTriggers.totalSize Maximum 15 record types per object Field: RecordTypes.totalSize