Mysten Labs and Google Cloud unveil Verifiable Agent Arbiter, keeping agent telemetry private while anchoring integrity proofs to Walrus and Sui

What changed

Mysten Labs and Google Cloud announced Verifiable Agent Arbiter (VAA) on October 6 as an evidence layer for enterprise AI agents. Detailed telemetry such as prompts, model outputs, tool calls and policy decisions remains in customer-controlled Google Cloud Storage, while cryptographic proofs of record integrity are stored on Walrus and coordinated on Sui. VAA also targets dispute replay for cross-company A2A transactions and can log authorization, spending decisions and service delivery for x402/Agent Payments workflows. The companies say initial enterprise deployments are planned before broader availability.