Function isUnknownToolMessage

packages/plugins/mcp/src/sdk/invoke.ts:151–157

(message: string, toolName: string)

const escapeRegExp = (value: string): string => value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");

export const isUnknownToolMessage = (message: string, toolName: string): boolean => {
  const name = escapeRegExp(toolName);
  return new RegExp(
    `(?:unknown tool:?\\s*"?${name}"?|tool\\s+"?${name}"?\\s+(?:not found|is not available|does not exist))`,
    "i",
  ).test(message);
};

/** The class name and stable code of an SDK rejection, for the defect log.
 *  Structural only: the message is deliberately not read here. */