LLM Agent Cache Design for Tool-Heavy Workflows

Tool-heavy agents repeat work constantly. Caching is the difference between viable and expensive.

Layered Cache

• Prompt fingerprint cache.
• Tool output cache by normalized args.
• Retrieval cache by semantic neighborhood.

const key = sha256(JSON.stringify({ promptTemplate, contextHash, toolSig }));

Cache policy must encode freshness risk, not only hit-rate goals.