import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import type { TransportMode } from 'rendezvous-kit';
import type { RoutingClient } from '../routing.js';
/** Compute a reachability polygon showing everywhere reachable within a given travel time. */
export declare function handleGetIsochrone(args: {
    lat: number;
    lon: number;
    transport_mode: TransportMode;
    time_minutes: number;
}, routingClient: RoutingClient): Promise<{
    content: {
        type: "text";
        text: string;
    }[];
    isError: true;
} | {
    content: {
        type: "text";
        text: string;
    }[];
    isError?: undefined;
}>;
export declare function registerIsochroneTool(server: McpServer, routingClient: RoutingClient): void;