export declare const TOOL_HISTORY_ARGUMENT_MAX_BYTES: number;
export declare const TOOL_HISTORY_RESULT_MAX_BYTES: number;
export interface BoundedToolHistoryPayload {
    readonly json: string;
    readonly sha256: string;
    readonly searchText: string;
    readonly originalBytes: number;
    readonly retainedBytes: number;
    readonly truncated: boolean;
}
/**
 * Apply the tool-history store's bounded inspection, redaction, and payload
 * limits without ever serializing an unbounded caller-owned value.
 */
export declare function boundedToolHistoryPayload(value: unknown, maxBytes: number, options?: {
    readonly maxStringBytes?: number;
}): BoundedToolHistoryPayload;
export declare function utf8Prefix(value: string, maxBytes: number): string;
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