import type * as z from "zod";
export declare const MCP_PROTOCOL_VERSION = "2025-06-18";
export type ToolEffect = "read" | "write" | "destructive";
export declare const toolAnnotations: (effect: ToolEffect) => {
    readonly readOnlyHint: boolean;
    readonly destructiveHint: boolean;
};
export interface McpTool<Ctx> {
    readonly name: string;
    readonly description: string;
    readonly inputSchema: Record<string, unknown>;
    readonly annotations: ReturnType<typeof toolAnnotations>;
    readonly call: (args: unknown, ctx: Ctx) => Promise<Record<string, unknown>>;
}
export declare const textResult: (text: string, isError?: boolean) => Record<string, unknown>;
export declare const converterReadable: (value: unknown) => unknown;
export declare const tool: <Schema extends z.ZodType, Ctx>(spec: {
    readonly name: string;
    readonly description: string;
    readonly effect: ToolEffect;
    readonly input: Schema;
    readonly run: (args: z.output<Schema>, ctx: Ctx) => Promise<Record<string, unknown>>;
}) => McpTool<Ctx>;
export interface McpAuditEntry {
    readonly tool: string;
    readonly args: Record<string, unknown>;
    readonly ok: boolean;
    readonly failure?: {
        readonly refused: boolean;
        readonly message: string;
    };
}
export interface McpServerSpec<Ctx> {
    readonly serverInfo: () => {
        readonly name: string;
        readonly version: string;
    };
    readonly tools: readonly McpTool<Ctx>[];
    readonly noSuchTool: (name: string) => string;
    readonly refused: (error: unknown) => boolean;
    readonly errorMessage: (error: unknown) => string;
    readonly audit: (entry: McpAuditEntry) => Promise<void> | void;
}
export declare const createMcpServer: <Ctx>(spec: McpServerSpec<Ctx>) => ((message: unknown, ctx: Ctx) => Promise<Record<string, unknown> | undefined>);
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