With evidence
Tool use
The tool runs, the model reads the result. No silent field invention.
Simple explanation
A tool computes or acts. The model must not fabricate the tool’s output.
Technical explanation
Deterministic calls (profiling, closed-set classification, schema extraction). Retry, idempotence, human review before side effects.
Evidence
Automation Agent measured (hitl-agent.v2) plus profiling in Decision Copilot (profile-llm.v1). Not a public MCP server.