import type { ToolGatewayCatalogEntry } from "@opengeni/contracts";
import type { Observability } from "@opengeni/observability";
export type WorkspaceToolGatewayAdapter = "http" | "mcp";
export type WorkspaceToolGatewayOperation = "approval" | "call";
export type WorkspaceToolGatewayOutcome = "ok" | "tool_error" | "approval_required" | "catalog_stale" | "invalid_input" | "not_found" | "rate_limited" | "failed";
/**
 * Low-cardinality gateway telemetry shared by HTTP/SDK/Site and aggregate MCP
 * adapters. Tool names, workspace/subject ids, arguments, results, credentials,
 * and approval tokens are excluded by construction.
 */
export declare function startWorkspaceToolGatewayObservation(observability: Observability | null | undefined, input: {
    adapter: WorkspaceToolGatewayAdapter;
    operation: WorkspaceToolGatewayOperation;
    source: ToolGatewayCatalogEntry["source"] | "aggregate";
}): {
    end: (outcome: WorkspaceToolGatewayOutcome) => void;
};