Defined in: activities/chat/tools/tool-calls.ts:46

Manages tool call accumulation and execution for the chat() method's automatic tool execution loop.

Responsibilities:

• Accumulates streaming tool call events (ID, name, arguments)
• Validates tool calls (filters out incomplete ones)
• Executes tool execute functions with parsed arguments
• Emits TOOL_CALL_END events for client visibility
• Returns tool result messages for conversation history

This class is used internally by the AI.chat() method to handle the automatic tool execution loop. It can also be used independently for custom tool execution logic.

const manager = new ToolCallManager(tools);

// During streaming, accumulate tool calls
for await (const chunk of stream) {
  if (chunk.type === 'TOOL_CALL_START') {
    manager.addToolCallStartEvent(chunk);
  } else if (chunk.type === 'TOOL_CALL_ARGS') {
    manager.addToolCallArgsEvent(chunk);
  }
}

// After stream completes, execute tools
if (manager.hasToolCalls()) {
  const toolResults = yield* manager.executeTools(finishEvent);
  messages = [...messages, ...toolResults];
  manager.clear();
}

new ToolCallManager(tools): ToolCallManager;

Defined in: activities/chat/tools/tool-calls.ts:50

readonly Tool<SchemaInput, SchemaInput, string>[]

ToolCallManager

addToolCallArgsEvent(event): void;

Defined in: activities/chat/tools/tool-calls.ts:72

Add a TOOL_CALL_ARGS event to accumulate arguments (AG-UI)

ToolCallArgsEvent

void

addToolCallStartEvent(event): void;

Defined in: activities/chat/tools/tool-calls.ts:57

Add a TOOL_CALL_START event to begin tracking a tool call (AG-UI)

ToolCallStartEvent

void

clear(): void;

Defined in: activities/chat/tools/tool-calls.ts:215

Clear the tool calls map for the next iteration

void

completeToolCall(event): void;

Defined in: activities/chat/tools/tool-calls.ts:86

Complete a tool call with its final input Called when TOOL_CALL_END is received

ToolCallEndEvent

void

executeTools(finishEvent): AsyncGenerator<ToolCallEndEvent, ModelMessage<
  | string
  | ContentPart<unknown, unknown, unknown, unknown, unknown>[]
| null>[], void>;

Defined in: activities/chat/tools/tool-calls.ts:118

Execute all tool calls and return tool result messages Yields TOOL_CALL_END events for streaming

RunFinishedEvent

RUN_FINISHED event from the stream

AsyncGenerator<ToolCallEndEvent, ModelMessage< | string | ContentPart<unknown, unknown, unknown, unknown, unknown>[] | null>[], void>

getToolCalls(): ToolCall[];

Defined in: activities/chat/tools/tool-calls.ts:107

Get all complete tool calls (filtered for valid ID and name)

ToolCall[]

hasToolCalls(): boolean;

Defined in: activities/chat/tools/tool-calls.ts:100

Check if there are any complete tool calls to execute

boolean