Reviewing the Early Academic Evolution of LLM Agent Tool-Use Harnesses

ChrisGPotts · x · 2026-08-07

The author reviews the origins of what we now call "LLM agent harnesses," noting that this perspective began forming in late 2019. Early exploration into multi-step tool use with neural language models was sparked by studying benchmarks like HotPotQA and GoldEn.

This trajectory also stems from past debates against the idea that "LLMs alone would supply all capabilities without external tools." The integration of external tools remains a crucial branch in LLM development.

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