Dynamic variables

Dynamic variables let one agent use call-specific values such as a caller name, account reference, campaign attribute, or action result.

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Variable sources

A value can come from:

• Defaults configured on the agent
• Test values entered for a preview
• Recipient metadata supplied for an outbound call or campaign
• An inbound webhook response
• An extraction or action result during the conversation

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Use variables safely

Give every required variable a default so the draft can be saved and previews remain predictable. Use a neutral fallback rather than a fake production value. Reference variables only in fields that support them, such as instructions, greetings, action requests, and flow conditions. Keep credentials in Secrets, not dynamic variables.

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Test missing and malformed values

Run a preview with the expected value, an empty value, an unexpected value, and characters that need pronunciation. Confirm that the agent does not expose raw placeholders or take an unsafe branch.