{"id":"2605.16790","title":"TIER: Trajectory-Invariant Execution Rewards for Multi-Step Tool Composition","url":"https://codeofpaper.com/paper/2605.16790","arxiv_url":"https://arxiv.org/abs/2605.16790","published":"2026-05-16","code":"none","best":null,"most_starred_community":null,"implementations":[],"possible_matches":0}