Why it matters

Scheduling is common agent use case. Understanding shapes assistant agents.

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The architecture

Google Calendar API or Outlook.

OAuth for user consent.

Calendar tool flowRead calendarcheck free/busyPropose timesbased on availabilityCreate eventwith confirmationOAuth + user consent per action; can't autonomously schedule without permission
Calendar tools.
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How it works end to end

OAuth: user consent for calendar access.

Free/busy: check availability without exposing details.

Confirmation: user approves before creating events.

Timezone handling: important + tricky.