AI_ToolCallNotFoundForApprovalError

This error occurs when a tool approval request references a tool call that was not found. This can happen when processing provider-emitted approval requests (e.g., MCP flows) where the referenced tool call ID does not exist.

Properties

• toolCallId: The tool call ID that was not found
• approvalId: The approval request ID

Checking for this Error

You can check if an error is an instance of AI_ToolCallNotFoundForApprovalError using:

import { ToolCallNotFoundForApprovalError } from 'ai';

if (ToolCallNotFoundForApprovalError.isInstance(error)) {
  // Handle the error
}