/**
 * Convert a host tool name into a model-facing function name.
 *
 * We sanitise to the allowed function-name charset (rather than hashing to an opaque
 * `yt_<hex>`), so the model keeps the semantic signal of a readable name — e.g.
 * `orders.list` → `orders_list`.
 *
 * This is a pure per-name transform; uniqueness across a manifest (and avoiding the
 * reserved `redirect` name / `mcp__` namespace) is handled by the caller via
 * {@link uniqueToolId}. Each runtime (the chat-ui iframe and this SDK's voice session)
 * decorates and reverse-maps with its own manifest, so the ids never need to match
 * across paths — only to be self-consistent within one.
 */
export declare function generateToolId(originalName: string): string;
/**
 * Resolve a collision-free, model-safe id for a host tool name, given the ids already
 * taken in this manifest (seed `used` with reserved names like `redirect`). Host ids must
 * never start with the `mcp__` namespace, which the dispatcher routes on.
 */
export declare function uniqueToolId(originalName: string, used: Set<string>): string;
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