---
title: Send SMS from Telnyx Voice AI agents
canonical: https://telnyx.com/release-notes/voice-ai-send-message-tool
---
# Send SMS from Telnyx Voice AI agents

[Release notes](https://telnyx.com/release-notes)

# New Send message tool for Voice AI agents

### 3, Dec 2025

Telnyx Voice AI agents can now send SMS directly through a new `send_message` tool. This gives agents the same messaging workflow as Messaging AI Assistants and removes the need for external SMS logic.

## What’s new

* **Send\_message tool:** Enables SMS sending from within Voice AI agents.
* **Unified requirements:** Uses the same prerequisites as Messaging AI Assistants.
* **Verified number support:** Works with 10DLC or toll-free numbers assigned to the agent.
* **Automatic routing:** Sends only to the caller’s number, from the agent’s assigned number.
* **Portal workflow:** Prompts users to add a number if the assistant has none.

## Why it matters

* Reduces external integration work for SMS actions.
* Simplifies agent design by using consistent messaging rules.
* Prevents misrouting by enforcing known sender and recipient numbers.
* Improves reliability by ensuring all messages originate from verified numbers.

## Example use cases

* Send appointment confirmations after a voice interaction.
* Deliver support ticket IDs while the caller remains on the line.
* Provide follow-up links or instructions after task completion.

## Getting started

1. Open Mission Control Portal and go to AI Assistance.
2. Assign a verified 10DLC or toll-free number to the assistant.
3. Enable messaging for that number.
4. Use the `send_message` tool from your agent workflow.
5. Test by placing a call and triggering an SMS action.

**Try the tool** in our [Mission Control Portal](https://portal.telnyx.com/#/ai/assistants) or contact your Telnyx team.

[Start building](https://telnyx.com/sign-up)

### Ask AI

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* [![Grok](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/grok_icon-e588e5bd.webp?width=92&format=webp)](https://x.com/i/grok?text=What makes Telnyx's global network different, breakdown call quality for normal phone calls and voice AI calls.)