/**
 * Cluster-arg resolver for native Kafka handlers. Asymmetric by connection
 * type:
 *
 * - Direct: returns `{ clusterId: undefined, envId: undefined }`. The
 *   `DirectClientManager` ignores cluster args and uses its eagerly-built
 *   single-instance client(s); the handler passes the undefineds through.
 * - OAuth: requires the args; throws with a discovery hint if missing.
 *   Handlers catch the throw at entry and convert to a `CallToolResult`
 *   with `isError: true` so the agent receives a normal tool-call error
 *   rather than an RPC failure.
 */
import { ServerRuntime } from "../../server-runtime.js";
export declare function resolveKafkaClusterArgs(args: {
    cluster_id?: string;
    environment_id?: string;
}, runtime: ServerRuntime, connId: string): {
    clusterId: string | undefined;
    envId: string | undefined;
};
/**
 * REST-tool variant of {@link resolveKafkaClusterArgs}. The Kafka REST API
 * places `cluster_id` directly in the URL path
 * (e.g. `/kafka/v3/clusters/{id}/topics`), so the handler always needs a
 * concrete cluster id — even on direct connections that omit the arg and
 * rely on the configured fallback.
 *
 * Direct: `args.clusterId ?? conn.kafka?.cluster_id`; throws if neither.
 *   `envId` is unused (direct's `kafka.rest_endpoint` already targets the
 *   per-cluster hostname).
 * OAuth: both `clusterId` and `environmentId` required. Argument names are
 *   camelCase to match the existing input-schema convention of these tools
 *   and `list-clusters`; the native-Kafka tools' snake_case `cluster_id` is
 *   a separate convention.
 */
export declare function resolveKafkaRestArgs(args: {
    clusterId?: string;
    environmentId?: string;
}, runtime: ServerRuntime, connId: string): {
    clusterId: string;
    envId: string | undefined;
};
/**
 * Env-only resolver for tools that scope a request to a single CCloud
 * environment without a cluster identifier (e.g., `list-clusters`).
 *
 * Direct: arg wins; falls back to `conn.kafka?.env_id`; throws if neither
 *   source supplies a value.
 * OAuth: arg required (no service block to fall back to); throws with a
 *   discovery hint pointing at `list-environments`.
 *
 * Argument name is camelCase (`environmentId`) to match the existing
 * input-schema convention of cluster-management tools.
 */
export declare function resolveEnvArg(args: {
    environmentId?: string;
}, runtime: ServerRuntime, connId: string): string;
/**
 * Disposes a Kafka client (admin or producer) iff the connection is OAuth-typed.
 * On direct connections this is a no-op — direct's `AsyncLazy` admin/producer
 * are manager-owned singletons and must not be disconnected by handlers. On
 * OAuth, calls `client.disconnect()` and swallows + logs any error so disposal
 * failure never masks the handler's own error.
 */
export declare function disposeIfOAuth(runtime: ServerRuntime, connId: string, client: {
    disconnect: () => Promise<void>;
}): Promise<void>;
/**
 * Renders any error thrown from a Kafka admin/producer/consumer call into a
 * single agent-readable string. Preserves per-topic-cause unwrapping for
 * `KafkaJSAggregateError`, surfaces `KafkaJSError.code` when present, and
 * falls back gracefully for unknown shapes.
 */
export declare function formatKafkaError(err: unknown): string;
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