### Answer Yes, you can extract variables for single prompt agents using the Extract Dynamic Variables tool. [(1) ]() Steps: 1. Add an "Extract Dynamic Variable Tool" to your agent 2. Click "+Add" and configure each variable with: - Variable Name – A short name to reference the variable - Description – A brief explanation of what this value should be - Variable Type – Choose from

Text

,

Number

,

Enum

, or

Boolean

3. Update your prompt to instruct the agent when to invoke the extraction. For example:

When user states his name and phone number, please extract the information by calling the `extract_user_details` function.

Available Variable Types: - Text - Any word or sentence (e.g.,

"John Smith"

) - Number - A numeric value (e.g.,

42

,

98.6

) - Enum - A value from a predefined list - Boolean - True or false This tool works for both single and multi-prompt agents as part of the general tools available in the Single/Multi Prompt agent framework. [(1) ]()

​ To learn more, see the sources I considered: [[1] Extract Dynamic Variables](https://docs.retellai.com/build/single-multi-prompt/extract-dv) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer --- Yes, once you extract a dynamic variable, you can reuse it later in the conversation. [(1) ]() [(2) ]() What you can do with extracted variables: - Reference collected data anytime during the call [(1) ]() - Pass dynamic variables to webhooks, CRMs, or integrations - Personalize workflows in real time For example, in custom functions you can reference saved variables using the

{{variable_name}}

syntax to include them in API calls or responses. [(5) ]()

​ To learn more, see the sources I considered: [[1] Major Platform Upgrades: Knowledge base, warm transfer, Voice & Analytics](https://www.retellai.com/changelog/major-platform-upgrades-knowledge-base-warm-transfer-voice-analytics) [[2] Platform Changelogs | Retell AI](https://www.retellai.com/changelog) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.