The tool-vs-context split breaks with multi-step tool chains — split by resolve time instead

JaseciLabs · reddit · 2026-09-30

The JaseciLabs team shares a framework from building agentic support for Jac: the "do → tool, know → context" heuristic breaks down in multi-step ReAct chains. The real split is whether a value can be resolved before reasoning starts or at a specific moment during it. Pre-resolving request-time-known data (policies, account tiers) into static context beats exposing it as a tool — saving a round trip and removing the failure mode where the model forgets to call it; live values (inventory, pricing) need real tools. They ask whether anyone encodes this as an explicit per-dependency "resolve-time" rule.

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