AI & Machine Learning in Mobile Rethinking Tool Retrieval for LLM Agents: New Study Reveals Complexity-Dependent Crossover Between Retrieval Paradigms October 20, 2026 Nila Kartika Wati As Large Language Models (LLMs) increasingly transition from conversational chat interfaces to autonomous agents capable of executing complex workflows, their reliance on external APIs has grown exponentially. Modern tool-augmented LLM…