The Agent Tool-Calling Pattern

Short summary

Agent tool-calling enables LLMs to reliably invoke external APIs by enforcing strict JSON schema contracts and closed-loop feedback loops, preventing handoff hallucinations where models might guess parameters. Each tool adds system surface area and security vectors, requiring robust schema governance and defensive validation layers.

• •Tool-calling bridges LLM thinking and system action through strict schema contracts
• •Closed-loop architecture prevents hallucinations by feeding execution results back to the model
• •Trade-off: more tools means more security vectors; requires robust schema governance

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