/**
 * Per-tool error suggestions for tool callback try/catch blocks.
 *
 * The model sees the error string returned by a tool and decides what to do
 * next. A raw `Prometheus HTTP 404: ...` string causes the model to give
 * up; a string that ends with "→ try log10x_event_lookup with a substring"
 * causes the model to chain to the next-best tool and recover.
 *
 * Each tool gets its own suggestion logic because the right alternative is
 * different per tool. There is no generic wrapper because there is no
 * generic right answer.
 */
export declare function describeToolError(toolName: string, raw: unknown): string;