Commercial lease → key terms
The break penalty isn't in the doc — so it's nulled and flagged, not invented.
Open the live lab · pre-loaded to this scenario
Tool-Use & Structured Output
Context
A commercial lease is parsed for rent, escalations, and the break option. The break penalty references 'Exhibit D — amount to be determined'; the first pass invents a number, and the gate forces it to null-and-flag for legal review instead.
The decision
Null-and-flag beats hallucinate: any value not present in the document is set null and routed to legal, never guessed — because a confident wrong number is worse than an honest blank.
What most miss
Extraction demos reward filling every field. On legal docs the disciplined move is leaving a field null when the source defers it — a fabricated penalty is a liability, not a convenience.
Stakes
An invented lease term that reaches an abstract or a model is a legal and valuation error carried downstream.
Studied · Agent & Protocol · verified 2026-07-03
Sources: Commercial-lease abstraction (rent, escalations, break options); Extraction hallucination controls (null-and-flag over invent)