mail-smtp-mcp

export type ErrorCode = | "CONFIG_MISSING" | "VALIDATION_ERROR" | "SEND_DISABLED" | "POLICY_VIOLATION" | "ATTACHMENT_ERROR" | "SMTP_ERROR" | "UNKNOWN_ERROR"; export class ToolError extends Error { public readonly code: ErrorCode; constructor(code: ErrorCode, message: string) { super(message); this.code = code; } } /** * Return a safe error message for tool consumers. */ export function formatToolError(error: unknown): { code: ErrorCode; message: string } { if (error instanceof ToolError) { return { code: error.code, message: error.message }; } if (error instanceof Error) { return { code: "UNKNOWN_ERROR", message: error.message }; } return { code: "UNKNOWN_ERROR", message: "Unexpected error." }; }