Mysten Labs said on Oct. 6 that it has partnered with Google Cloud to launch a Verifiable AI Arbiter, or VAA, a jointly developed evidence layer designed to help enterprises prove that their AI agents are acting within authorized boundaries. The announcement targets a growing operational problem for companies looking to move AI agents into production: while agents are starting to execute transactions, negotiate with other agents, and operate across organizational boundaries, firms still lack activity records that counterparties, auditors, and regulators can independently trust.
According to the announcement, VAA is built to create an activity record that can be verified independently of the platform that generated it. Mysten Labs said this is intended to address enterprise concerns around auditability and regulatory readiness, including compliance with the European Union AI Act. The company noted that, starting in 2027, failures related to logging under that law could trigger fines of up to €15 million or 3% of a company’s global annual turnover.
The system separates the activity log itself from the proof of its integrity. Detailed telemetry data, including prompts, model outputs, tool calls, and policy decisions, will remain private and stored in customer-controlled Google Cloud Storage. Cryptographic proofs tied to those records will be stored on Walrus, a data platform built for AI application needs, and coordinated through the Sui Layer 1 blockchain.
Mysten Labs said on Oct. 6 that it has partnered with Google Cloud to launch a Verifiable AI Arbiter, or VAA, a jointly developed evidence layer aimed at helping enterprises prove that their AI agents are operating within authorized limits.
A record enterprises can verify independently
According to the announcement, the launch comes as AI agents begin to execute transactions, negotiate with other agents, and act across enterprise boundaries. VAA is designed to give companies an activity record that can be verified independently of the platform that produced it.
Mysten Labs said enterprises want to move AI agents into production environments, but adoption has been limited by the lack of activity records that counterparties, auditors, or regulators can trust. VAA is intended to provide that record and help firms meet incoming regulatory requirements, including those under the European Union AI Act.
Reference to the EU AI Act
The company said that, beginning in 2027, failures related to logging under the EU AI Act could carry penalties of as much as €15 million or 3% of a company’s global annual turnover.
How the system stores records and proofs
In the system design, VAA separates records of AI agent activity from proofs of their integrity. Detailed telemetry data, including prompts, model outputs, tool calls, and policy decisions, will remain private in customer-controlled Google Cloud Storage.
The cryptographic proof of that record will be stored on Walrus, a data platform built for AI application needs, and coordinated through Sui, a Layer 1 blockchain.
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