Product design question

Design a feature for Facebook Portal to use in case of emergency.

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What this question tests

Product design for a home hardware device: can you design an emergency feature that fits Portal's context, always on camera and speaker in the home.

Define the scenario, assume a medical emergency, fall, or break in where a person cannot easily reach a phone.
Identify Portal's advantage for this, hands free voice activation and an always available camera and speaker already in the home.
Design the feature: a voice triggered emergency call that connects to a pre set emergency contact or dispatches to local services, activated by a spoken phrase.
Add a fallback for non verbal emergencies, like a physical button press, in case the person cannot speak.
Address false positive risk, since a misheard trigger phrase could cause unwanted calls or panic.
Define success as response time from trigger to contact reached, and false trigger rate kept very low.

Uses Portal's actual hardware strengths, hands free voice and camera, instead of designing a generic emergency app feature.
Includes a non verbal fallback, recognizing not all emergencies allow speaking clearly.
Names false trigger rate as a real risk to manage, not just response speed.

Designing a feature that requires phone use, missing Portal's hands free advantage.
Ignoring the false positive risk of voice activated emergency calling.

How would you handle a false alarm to avoid dispatching real emergency services unnecessarily?
How would elderly or non tech savvy users learn this feature exists?