phone-calls

To set up Twilio for AI voice assistant phone calls, you must complete the twilio-setup prerequisite to verify your configuration before calls can be enabled on your account.

You make outbound calls by providing the callee's E.164 formatted phone number and a plain language objective prompt, which triggers the call_start tool to execute the conversation.

Yes, inbound calls are received automatically once calls are enabled and a Twilio number is provisioned, and you can retrieve bidirectional call transcripts after completion.

Yes, you must format phone numbers using E.164 validation to successfully execute tool-backed call_start, call_status, and call_end actions for voice routing.

Guardian verification handles live user consult requests via guardian channels during an active call, allowing real-time call steering through HTTP instructions with safe consultation timeout handling.

Outbound call limitations include enforcing correct phone number formats, applying E.164 validation, and accounting for trial account limitations when placing calls to execute tasks like reservations.