AsyncTool: Evaluating the Asynchronous Function Calling Capability under Multi-Task Scenarios

Fuente: arXiv
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Auteurs principaux: Shi, Kou, Zhang, Ziao, Huang, Shiting, Nie, Avery, Fang, Zhen, Wang, Qiuchen, Chen, Lin, Chen, Huaian, Chen, Zehui, Zhao, Feng
Format: Preprint
Publié: 2026
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author Shi, Kou
Zhang, Ziao
Huang, Shiting
Nie, Avery
Fang, Zhen
Wang, Qiuchen
Chen, Lin
Chen, Huaian
Chen, Zehui
Zhao, Feng
author_facet Shi, Kou
Zhang, Ziao
Huang, Shiting
Nie, Avery
Fang, Zhen
Wang, Qiuchen
Chen, Lin
Chen, Huaian
Chen, Zehui
Zhao, Feng
contents Large language model (LLM)-based agents have shown strong capabilities in using external tools to solve complex tasks. However, existing evaluations often overlook the temporal dimension of tool use, especially the impact of tool response latency, and are usually limited to single-task settings. In real-world applications, multiple tasks often need to be executed concurrently, and overall efficiency depends on whether an agent can use idle time while waiting for tool responses. We refer to this capability as asynchronous tool calling. To evaluate it, we propose AsyncTool, a benchmark for assessing LLM-based agents in interactive multi-task tool-use environments with delayed tool feedback. AsyncTool presents multiple heterogeneous tasks simultaneously and simulates realistic tool response latency during execution. Using a hybrid data evolution strategy, we construct a diverse asynchronous multitasking dataset that covers multiple scenarios and tool-use patterns. We evaluate models at the step, sub-task, and task levels, and introduce efficiency-oriented metrics to measure task coordination and completion efficiency. Extensive experiments show that delayed tool feedback poses substantial challenges to current agents and leads to clear performance degradation. Models that better coordinate task switching, dependency tracking, and state maintenance achieve stronger performance on AsyncTool. Our analysis identifies key failure modes of current tool-using agents and provides practical insights for designing future systems with stronger temporal reasoning and coordination capabilities.
format Preprint
id arxiv_https___arxiv_org_abs_2605_27995
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle AsyncTool: Evaluating the Asynchronous Function Calling Capability under Multi-Task Scenarios
Shi, Kou
Zhang, Ziao
Huang, Shiting
Nie, Avery
Fang, Zhen
Wang, Qiuchen
Chen, Lin
Chen, Huaian
Chen, Zehui
Zhao, Feng
Artificial Intelligence
Large language model (LLM)-based agents have shown strong capabilities in using external tools to solve complex tasks. However, existing evaluations often overlook the temporal dimension of tool use, especially the impact of tool response latency, and are usually limited to single-task settings. In real-world applications, multiple tasks often need to be executed concurrently, and overall efficiency depends on whether an agent can use idle time while waiting for tool responses. We refer to this capability as asynchronous tool calling. To evaluate it, we propose AsyncTool, a benchmark for assessing LLM-based agents in interactive multi-task tool-use environments with delayed tool feedback. AsyncTool presents multiple heterogeneous tasks simultaneously and simulates realistic tool response latency during execution. Using a hybrid data evolution strategy, we construct a diverse asynchronous multitasking dataset that covers multiple scenarios and tool-use patterns. We evaluate models at the step, sub-task, and task levels, and introduce efficiency-oriented metrics to measure task coordination and completion efficiency. Extensive experiments show that delayed tool feedback poses substantial challenges to current agents and leads to clear performance degradation. Models that better coordinate task switching, dependency tracking, and state maintenance achieve stronger performance on AsyncTool. Our analysis identifies key failure modes of current tool-using agents and provides practical insights for designing future systems with stronger temporal reasoning and coordination capabilities.
title AsyncTool: Evaluating the Asynchronous Function Calling Capability under Multi-Task Scenarios
topic Artificial Intelligence
url https://arxiv.org/abs/2605.27995