New Send message tool for Voice AI agents

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.