Preprint
Aug 2026
The Devil Is in the Interface: Evaluating How Tool Architecture Shapes Coding Agent Behavior
This work compares six tool architectures that hold the underlying information and actions similar while varying how they are organized and exposed to the model, across three actors and a total of 11,700 trajectories to show that, even when tools provide similar capabilities, tool architecture changes agent behavior.
Xiangzhe Xu, H. Saghir, Qianhui Wu et al.
· 1 citation