import { type Tool } from 'ai';
import { z, type ZodType } from 'zod';
export type ToolDefinition<INPUT extends ZodType<any>, OUTPUT> = {
    description: string;
    inputSchema: INPUT;
    execute: (input: z.infer<INPUT>, context: {
        abortSignal?: AbortSignal;
    }) => Promise<OUTPUT>;
    group?: string;
};
export declare function defineTool<INPUT extends ZodType<any>, OUTPUT>(name: string, def: ToolDefinition<INPUT, OUTPUT>): Tool<z.infer<INPUT>, OUTPUT>;
export declare function describeTool(name: string): string;
export declare function toolNamesFromStep(step: unknown): string[];
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