Gauntlet: What happens when your agent's tools fight back

Gauntlet is an automated adversarial testing system that uses a "mocking agent" to identify security vulnerabilities in AI agents by intentionally injecting errors and malicious data into tool calls. By leveraging Elasticsearch for both short-term coherence and long-term memory, the system evolves its strategies over time to discover increasingly creative and novel attack patterns. This approach significantly reduces the manual effort required for testing, allowing developers to move beyond simple "happy path" evaluations to more robust, scalable security assessments.