Describe the inspiration for your proposal

It would be great if it was possible to define that either field y or x is required.

Describe the proposal

If you want to send an email you can either have a to field or bcc field or both, but none is not acceptable.

"To": {
 "type": "array",
 "title": "To",
 "description": "An array of recipient email addresses.",
 "items": {
 "type": "string",
 "format": "email"
 }
},
"Bcc": {
 "type": "array",
 "title": "Bcc",
 "description": "An array of BCC email addresses.",
 "items": {
 "type": "string",
 "format": "email"
 }
},

Describe alternatives you've considered

No response

Additional context

No response