type JsonRecord = Record<string, unknown>;
export type ToolProgressTone = "running" | "success" | "danger";
export interface ToolProgressPresentation {
    readonly keyPart: string;
    readonly label: string;
    readonly status: string;
    readonly tone: ToolProgressTone;
}
/**
 * Preserve useful start metadata (for example a tool name) when a later
 * completion update contains only status/result fields.
 */
export declare function mergeToolProgressSnapshot(previous: unknown, current: unknown): JsonRecord;
export declare function describeToolProgress(value: unknown): ToolProgressPresentation;
export {};
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