import type { InputParamValidator, InputParamValidatorReturn } from "../server/types.js";
/**
 * CustomValidator is a hands-off, “bring-your-own-validator” which
 * @implements {InputParamValidator} and is expected that the caller provide a custom
 * "parse" function.
 *
 * @param T - the runtime type produced by the validator
 * @param S - the raw JSON Schema object
 *
 * The caller provides a "parseFn" that returns a @type InputParamValidatorReturn
 * which is used to infer the type of the JSON schema in a tool's handler
 * callback.
 *
 * This implementation matches the contract of "InputValidator<T>.parse".
 */
export declare class CustomValidator<T, S extends object = object> implements InputParamValidator<T> {
    readonly jsonSchema: S;
    private readonly parseFn;
    constructor(jsonSchema: S, parseFn: (input: unknown) => InputParamValidatorReturn<T>);
    parse(input: unknown): InputParamValidatorReturn<T>;
}