Defined in: types.ts:839

Emitted when a tool call starts.

• BaseAGUIEvent

optional index: number;

Defined in: types.ts:848

Index for parallel tool calls

optional model: string;

Defined in: types.ts:751

Model identifier for multi-model support

BaseAGUIEvent.model

optional parentMessageId: string;

Defined in: types.ts:846

ID of the parent message that initiated this tool call

optional rawEvent: unknown;

Defined in: types.ts:753

Original provider event for debugging/advanced use cases

BaseAGUIEvent.rawEvent

timestamp: number;

Defined in: types.ts:749

BaseAGUIEvent.timestamp

toolCallId: string;

Defined in: types.ts:842

Unique identifier for this tool call

toolName: string;

Defined in: types.ts:844

Name of the tool being called

type: "TOOL_CALL_START";

Defined in: types.ts:840

BaseAGUIEvent.type