### Answer Based on the available documentation, there isn't a per-function-call parameter like

allow_interruption: false

that you can set dynamically during specific tool executions. However, here are the relevant options: Agent-level interruption control: You can set

interruption_sensitivity

at the agent level, with values ranging from 0 to 1. Setting it to 0 means the agent would never be interrupted. [(1) ]() Agent Transfer specific option: For Agent Transfer, you can configure "Speak during execution and messages" — this controls if the agent should speak something while performing the transfer. [(2) ]() , [(3) ]() Potential workarounds: 1. Use Agent Transfer to a second agent configured with

interruption_sensitivity: 0

specifically for delivering the transfer message, then transfer to the final destination agent. [(2) ]() , [(3) ]() 2. If using Conversation Flow, you could potentially route to a node that uses an agent with interruptions disabled for that specific step. The documentation does not show a way to dynamically toggle interruption behavior mid-conversation on a per-function basis. If this is a critical requirement, I'd suggest reaching out to Retell support: - Visit [Contact Sales]() - Check [) Would you like a general answer on how this might be approached architecturally?

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

​ To learn more, see the sources I considered: [[1] Create Voice Agent](https://docs.retellai.com/api-references/create-agent) [[2] Agent Transfer](https://docs.retellai.com/build/single-multi-prompt/transfer-agent) [[3] Agent Transfer Node](https://docs.retellai.com/build/conversation-flow/transfer-agent-node) ​