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About this paper

Guanting Dong, Zhichao Sun, Xinyu Yang, Rui Wang, Xin Deng, Jiajie Jin, Zhixiong Yang, Junhao Huang and 17 more

ToolSpace builds executable cross-service task paths from observed tool-call traces, linking adjacent calls through data, state, and retry dependencies. It samples paths whose inputs are available, replays them from initial states, and retains those passing checks. ToolSpace-35B-A3B averages 41.0 across seven benchmarks, versus 23.0 for its backbone and 43.2 after on-policy RL; replay validates chains, not agent success.

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