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Your mesh enables mutual TLS for all service-to-service traffic, with certificates issued to each workload. Security asks what this buys you over ordinary TLS. What is the accurate answer?

The caller can be trusted to declare its own identity in a header, since the encrypted channel prevents any intermediary from forging or rewriting that header

The callee also verifies the caller's certificate, so it obtains a cryptographically proven workload identity it can write authorization policy against

Traffic becomes encrypted in both directions, whereas ordinary TLS encrypts only the responses flowing back from the server to the client

The callee learns which end user initiated the request from the peer certificate, so per-user permission checks can move out of the application and into mesh policy