Mysten Labs and Google Cloud launch Verifiable Agent Arbiter for AI agents

Mysten Labs and Google Cloud announced the Verifiable Agent Arbiter (VAA), an evidence layer that lets enterprises prove their AI agents acted within granted authority. Prompts, model outputs and tool calls stay in customer-controlled Google Cloud Storage, cryptographic proofs go to Walrus, and Sui coordinates them. From 2027, the EU AI Act can fine logging failures up to €15 million or 3% of turnover.

• VAA keeps prompts and tool calls in customer-controlled Google Cloud Storage
• Integrity proofs go to Walrus, with Sui coordinating the records
• Features include A2A dispute replay, incident reconstruction and post-quantum retention
• EU AI Act fines for logging failures reach €15M or 3% of turnover from 2027