How to Evaluate Live & Voice Agents in ADK

Native live evaluation in Google’s Agent Development Kit (ADK) enables developers to test voice-based agents through simulated spoken conversations, helping assess multi-turn behavior, timing, tool use, context retention, and recovery from interaction issues before deployment. The workflow supports graph-based multi-agent systems, with session state and audio streams preserved across handoffs, and evaluation cases can use either goal-driven simulated personas or fixed, scripted user conversations. Developers configure live mode, audio synthesis, simulated-user behavior, voice, language, turn limits, and rubric-based scoring in a test configuration, allowing end-to-end trajectory quality and per-turn performance to be measured. Evaluations can run through the ADK CLI or programmatically in CI/CD pipelines, while ADK Web provides transcripts, audio playback, and interactive debugging tools to inspect both what an agent said and how it sounded.

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