What is a tool schema — CCA-F Exam Prep

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L1.23|What is a tool schema
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Real story
A detective at a crime scene. On a table: a fingerprint kit, a UV light, and evidence bags. Each has a label with instructions. Next to them, an unlabeled mystery device with no instructions. The detective holds the mystery device, confused. Dark forensic scene, evidence markers on the floor.

A detective arrives at a crime scene with unlabeled equipment.

Fingerprint kit -- she knows what it does, what it needs (a surface), and what it produces (a print). UV light -- she knows it reveals fluids invisible to the eye. Evidence bags -- labeled with chain-of-custody instructions.

Then she picks up a device with no label, no instructions, no description. She presses buttons. Waves it around. Nothing useful happens. Later she learns it was a portable mass spectrometer. It could have identified the poison that killed the victim.

The tool existed. The instructions didn't. Case went cold.