import { type JsonSchema } from "./subschemas.js";
import { UninterpretedSchema } from "./unusable-schema.js";
/** Whether `schema`, or the local reference it holds, is object-only. */
export declare function isObjectOnly(schema: unknown, root?: unknown, ancestors?: Set<unknown>): boolean;
/** Whether the checks read a schema whose `$schema` is `dialect`. */
export declare function interpretsDialect(dialect: unknown): boolean;
/**
 * The checks every list that offers a tool runs on its input schema, read
 * from a plain copy (`plainJsonSnapshot`) the check may edit: `defineAction`
 * on the source it strips, MCP and the in-app agent on the parameters they
 * convert, and the MCP client on each remote tool. Throws
 * `UnusableSchemaError` for a root that is not an object schema or that no
 * object satisfies, a position no value satisfies, and a reference that does
 * not resolve. Returns the copy with its local references rebased into root
 * `$defs`, so stripping and flattening cannot leave a valid one dangling.
 * A `$schema` other than 2020-12, which MCP assumes when there is none, turns
 * off every check but the object root `main` required: the schema comes back
 * unread, as an `UninterpretedSchema`.
 */
export declare function assertUsableSchema(snapshot: unknown): JsonSchema | UninterpretedSchema;