F06-TO: Yes
Rationale
The onion-service rendezvous handshake establishes keys between the client and onion service, beyond the separate relay-link encryption. The rendezvous relay joins circuits without becoming the application plaintext endpoint. The boundary ends at the service's Tor endpoint; a separate backend connection is not automatically protected.
Assessment method
Individual review of inherited classification; no protocol execution
Source context
Primary specification / explicit endpoint and observer scope