Cover image

Mind the Gap: How Tool Graph Retriever Fixes LLMs’ Missing Links

TL;DR for operators A user asks an AI agent to delete an account. The obvious tool is DeleteAccount. A normal semantic retriever will probably find it. Splendid. The agent still fails if it misses GetUserToken, because the deletion tool needs a token first. This is the failure mode Tool Graph Retriever, or TGR, is built to address.1 ...

August 8, 2025 · 18 min · Zelina
Cover image

Plug Me In: Why LLMs with Tools Beat LLMs with Size

TL;DR for operators The Athena paper is useful because it makes a simple operational point that many AI buying committees still manage to avoid: a bigger language model is not the same thing as a better workflow.1 An LLM can explain, infer, and format. It is still a poor substitute for a calculator, a live database, a calendar API, a search service, or a domain-specific computation engine. This is not a moral failure. It is just architecture. ...

July 14, 2025 · 14 min · Zelina