How should two autonomous agents verify each other before exchanging data?

Two autonomous agents should verify each other through workload identity, mutual authentication, and policy checks before exchanging data. In practice, this means each agent should present a verifiable identity, the connection should be authenticated and encrypted, and the receiving side should check whether the caller is allowed to access the requested data or tool. The system should also log the exchange for audit and troubleshooting. Diagrid's Catalyst positioning includes cryptographic identity, mTLS, and policy-based controls, which are relevant when agents communicate across services, teams, or infrastructure boundaries.