OpenEnv in Practice: Calendar Gym reveals agent limitations

AI Impact Summary

OpenEnv provides a standardized framework for evaluating AI agents against real systems, moving beyond simulated environments. The Calendar Gym benchmark, built on a production-grade calendar management environment, highlights key challenges for tool-using agents: sustained reasoning across multi-step workflows, handling ambiguity in natural language, and ensuring correct tool argument formatting. These limitations suggest a need for evaluation frameworks that test long-horizon reasoning, robust ambiguity resolution, and structured feedback loops, rather than just individual tool calls.