import type { AgentToolResult, AgentToolUpdateCallback } from '@earendil-works/pi-agent-core';
import type { TurnOrigin } from '@xopcai/endpoint-tools-protocol';
export declare const EXTERNAL_TOOL_SOURCES: readonly ["mcp", "composio", "extension", "memory", "endpoint"];
export type ExternalToolSource = (typeof EXTERNAL_TOOL_SOURCES)[number];
export interface ExternalToolSearchHit {
    toolRef: string;
    source: ExternalToolSource;
    namespace: string;
    title: string;
    summary: string;
}
export interface ExternalToolDescriptor extends ExternalToolSearchHit {
    description: string;
    inputSchema: Record<string, unknown>;
}
export interface VersionedExternalToolDescriptor extends ExternalToolDescriptor {
    revision: string;
}
export interface ExternalToolExecutionContext {
    toolCallId: string;
    signal?: AbortSignal;
    onUpdate?: AgentToolUpdateCallback<Record<string, unknown>>;
}
export interface ExternalToolTurnContext {
    channel: string;
    chatId: string;
    sessionKey: string;
    origin: TurnOrigin;
}
export interface ExternalToolProvider {
    readonly source: ExternalToolSource;
    search(query: string): Promise<ExternalToolSearchHit[]>;
    describe(toolRef: string): Promise<ExternalToolDescriptor | undefined>;
    execute(toolRef: string, args: Record<string, unknown>, approvalId: string | undefined, context: ExternalToolExecutionContext): Promise<AgentToolResult<Record<string, unknown>>>;
}