import { type Tool } from "@modelcontextprotocol/sdk/types.js";
import type { TSchema } from "typebox";
export declare const STRUCTURED_OUTPUT_TOOL_NAME = "StructuredOutput";
export declare const STRUCTURED_OUTPUT_SERVER_NAME = "structured_output";
export declare const STRUCTURED_OUTPUT_TOOL_DESCRIPTION: string;
export interface StructuredOutputToolRegistration {
    readonly url: string;
    tryCaptured(): unknown | undefined;
    release(): void;
}
/** Runner-scoped localhost MCP host. It binds only once a schema run actually needs injection. */
export declare class StructuredOutputToolHost {
    private readonly slots;
    private server;
    private listenPromise;
    private port;
    isListening(): boolean;
    listeningPort(): number | undefined;
    register(schema: TSchema): Promise<StructuredOutputToolRegistration>;
    dispose(): Promise<void>;
    private ensureListening;
    private handleRequest;
    private slotFor;
}
export declare function structuredToolInputSchema(schema: TSchema): Tool["inputSchema"];
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