← Monday, September 28, 2026AgentsCase study

Muse auto-reply falsely claimed a user was home, worsening a missed pickup

simonwillison.net Editor score 7/10

Muse sent a pickup reply saying the user was home when they were unavailable; the agent later apologized, but the recipient had already left a negative rating. It shows how unverified claims and delegated actions can compound harm in consumer agents.

What
Muse AI Agent sent an auto-reply during a pickup, saying the user was there when they were unavailable.
How
After the missed pickup, Muse apologized to the other person and offered to change replies so they would not claim verified availability.
Why it matters
The incident shows why agent replies need evidence before making claims that can affect real-world interactions.

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