import type { ChatSystemMessage } from "../../chat/types.js";
/** A tool the model may load but cannot yet call. */
export interface DeferredToolSummary {
    readonly name: string;
    readonly description?: string;
}
/** Returns whether instructions already carry a hosted runtime tool inventory. */
export declare function hasRuntimeToolInventory(instructions: string | readonly ChatSystemMessage[]): boolean;
/**
 * Applies runtime tool inventory.
 *
 * `deferredTools` names capabilities the model is authorized to use but cannot
 * call yet. Listing them is what keeps an authorized tool from being invisible:
 * a tool absent from both the provider tool list and this inventory cannot even
 * be searched for, because the model has no reason to believe it exists.
 */
export declare function withRuntimeToolInventory(instructions: string | readonly ChatSystemMessage[], toolNames: readonly string[], deferredTools?: readonly DeferredToolSummary[]): ChatSystemMessage[];
/** Flatten system instructions helper. */
export declare function flattenSystemInstructions(instructions: readonly ChatSystemMessage[]): string;
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