What Is Agent Evaluation? A Practical Guide for AI Teams

Agent evaluation is a critical process for assessing whether an AI agent effectively performs its designated tasks across various scenarios, including real inputs, edge cases, and different versions. Unlike LLM evaluation, which focuses on the quality of a single response, agent evaluation examines the entire multi-step process, including tool selection, API calls, and workflow execution, to ensure agents complete tasks correctly and reliably. This evaluation involves different methods, such as black-box, trajectory, and component-level evaluations, each analyzing various aspects of the agent's performance. Key metrics used in agent evaluation include task completion rate, tool selection accuracy, unsupported-claim rate, latency, and cost, which help teams gauge both the quality and reliability of the agent. PromptLayer facilitates this evaluation by providing tools for versioning, testing, and monitoring agents, enabling AI teams to make the evaluation process a consistent part of the development and release cycle, thus enhancing confidence and reducing the risk of failures or regressions in production.