AutoTool: Automatic Scaling of Tool-Use Capabilities in RL via Decoupled Entropy Constraints - Zeng, Yirong; Ding, Xiao; Liu, Yufei; Wang, Yuxian; Du, Qunyao; Hou, Yutai; Ning, Wu; Song, Haonan; Tang, Duyu; Tu, Dandan; Qin, Bing; Liu, Ting (International Conference on Learning Representations, 2026)