export declare class MCPConnectionError extends Error {
    readonly cause?: unknown | undefined;
    constructor(message: string, cause?: unknown | undefined);
}
export declare class DuplicateToolNameError extends Error {
    readonly toolName: string;
    constructor(toolName: string);
}
/**
 * Thrown when a task-required tool is explicitly bound via `mcp.tools([...])`,
 * called via `callTool()`, or named in a `toolFilter` list, but the server
 * does not declare the tasks capability for tools/call, so the call could
 * never execute. (Auto-discovery without a `toolFilter` list skips such tools.)
 */
export declare class MCPTaskRequiredToolError extends Error {
    readonly toolName: string;
    constructor(toolName: string);
}
export declare class MCPToolNotFoundError extends Error {
    readonly toolName: string;
    constructor(toolName: string);
}
type ToolFilterDetails = {
    /** Listed, but the server has no tool with this name. */
    missing: Array<string>;
    /** Listed more than once. */
    repeated: Array<string>;
    /** The server's tool names. */
    available: Array<string>;
};
/**
 * Thrown by `tools()` when a `toolFilter` list names a tool that the server
 * does not have, or names a tool more than once.
 */
export declare class MCPToolFilterError extends Error {
    /** Listed, but the server has no tool with this name. */
    readonly missing: Array<string>;
    /** Listed more than once. */
    readonly repeated: Array<string>;
    /** The server's tool names. */
    readonly available: Array<string>;
    constructor(details: ToolFilterDetails);
}
/**
 * The server did not advertise MCP Events, or it answered method not found.
 *
 * @experimental
 */
export declare class MCPEventsUnsupportedError extends Error {
    constructor();
}
/**
 * Invalid MCP Events client options or subscribe arguments.
 *
 * @experimental
 */
export declare class MCPEventConfigError extends Error {
    readonly reason: string;
    constructor(reason: string);
}
/**
 * The event name is missing from `events/list`, or it has no webhook delivery.
 *
 * @experimental
 */
export declare class MCPUnknownEventError extends Error {
    readonly eventName: string;
    readonly reason: 'not-found' | 'webhook-unsupported';
    constructor(eventName: string, reason: 'not-found' | 'webhook-unsupported');
}
/**
 * Kind of a JSON-RPC error from an `events/*` request.
 *
 * @experimental
 */
export type MCPEventRequestKind = 'invalid-params' | 'not-found' | 'forbidden' | 'resource-exhausted' | 'unsupported' | 'callback-endpoint' | 'unknown';
/**
 * The server returned a JSON-RPC error for an `events/*` request.
 *
 * @experimental
 */
export declare class MCPEventRequestError extends Error {
    readonly code: number;
    readonly kind: MCPEventRequestKind;
    readonly reason?: string | undefined;
    readonly data?: unknown | undefined;
    readonly cause?: unknown | undefined;
    constructor(message: string, code: number, kind: MCPEventRequestKind, reason?: string | undefined, data?: unknown | undefined, cause?: unknown | undefined);
}
/**
 * `refresh` or `unsubscribe` was given a key or id that is not in the store.
 *
 * @experimental
 */
export declare class MCPEventSubscriptionNotFoundError extends Error {
    readonly ref: {
        key?: string;
        id?: string;
    };
    constructor(ref: {
        key?: string;
        id?: string;
    });
}
export {};