export type Tier = "read" | "stimulus" | "mutate-host" | "danger";
type TierFn = (args: Record<string, unknown>) => Tier;
export declare const TOOL_TIERS: Record<string, Tier | TierFn>;
/** Tier of a concrete call. Unknown tools are treated as danger — a tool that
 *  forgot to declare itself must not slip past confirmation. */
export declare function tierOf(tool: string, args: Record<string, unknown>): Tier;
export declare function annotationsFor(tier: Tier): {
    readOnlyHint: boolean;
    destructiveHint: boolean;
    idempotentHint: boolean;
    openWorldHint: boolean;
};
export {};