AVATAR: OptimizingLLMAgentsforToolUsagevia ContrastiveReasoning

InIRsystems, theretrievermodule directly influences theperformance ofdownstream tasks, such as retrieval-augmented generation [20, 29, 30] and knowledge-intensive question answering [34, 52]. However, these methods do not explicitly consider targeted optimization for tool usage or the impact on complex multi-stage tasks.