Interface LlmToolCallStartEvent

Start of a model-requested tool call.

interface LlmToolCallStartEvent {
    index: number;
    toolCallId: string;
    toolName: string;
    type: "tool-call-start";
}

Properties

index: number

Stable per-turn index for tracking parallel calls.

toolCallId: string

Provider-generated tool call identifier.

toolName: string

Tool name exposed to the model.

type: "tool-call-start"

Event discriminator.