import { z } from "zod";
/**
 * MCP tool: send_message
 *
 * Phase A v0.1 real-time A2A messaging. POSTs to /v1/messages with
 * the agent's existing credentials. Feature-flag-gated server-side
 * (accounts.feature_flags.realtime_messaging); returns a clear error
 * to the model when the flag is off.
 */
declare const schema: z.ZodObject<{
    recipient: z.ZodString;
    body: z.ZodString;
    thread_id: z.ZodOptional<z.ZodString>;
    in_reply_to_id: z.ZodOptional<z.ZodString>;
    content_type: z.ZodOptional<z.ZodString>;
}, "strip", z.ZodTypeAny, {
    recipient: string;
    body: string;
    thread_id?: string | undefined;
    in_reply_to_id?: string | undefined;
    content_type?: string | undefined;
}, {
    recipient: string;
    body: string;
    thread_id?: string | undefined;
    in_reply_to_id?: string | undefined;
    content_type?: string | undefined;
}>;
export type SendMessageInput = z.infer<typeof schema>;
export declare function createSendMessageTool(args: {
    apiBase: string;
    apiKey: string;
    agentId: string;
}): {
    name: "send_message";
    description: string;
    schema: z.ZodObject<{
        recipient: z.ZodString;
        body: z.ZodString;
        thread_id: z.ZodOptional<z.ZodString>;
        in_reply_to_id: z.ZodOptional<z.ZodString>;
        content_type: z.ZodOptional<z.ZodString>;
    }, "strip", z.ZodTypeAny, {
        recipient: string;
        body: string;
        thread_id?: string | undefined;
        in_reply_to_id?: string | undefined;
        content_type?: string | undefined;
    }, {
        recipient: string;
        body: string;
        thread_id?: string | undefined;
        in_reply_to_id?: string | undefined;
        content_type?: string | undefined;
    }>;
    handler: (input: SendMessageInput) => Promise<{
        isError: boolean;
        content: {
            type: "text";
            text: string;
        }[];
    } | {
        content: {
            type: "text";
            text: string;
        }[];
        isError?: undefined;
    }>;
};
export {};