/**
 * Tool-signature deduplication — pure module, no I/O, no side effects.
 *
 * ## Algorithm
 *
 * `computeToolSignature` builds a canonical, order-insensitive string from:
 *   1. The tool's name (exact, case-preserved).
 *   2. A normalised description: lowercased, all whitespace runs collapsed to a
 *      single space, leading/trailing whitespace stripped.
 *   3. A sorted, deduplicated list of JSON-schema property names (top-level
 *      `properties` keys from `inputSchema`).  If the schema exposes a `type`
 *      field on each property, that type string is appended as `name:type`.
 *
 * `dedupeTools` clusters tools by pairwise token-set Jaccard similarity:
 *
 *   Jaccard(A, B) = |A ∩ B| / |A ∪ B|
 *
 * where A and B are the _sets_ of whitespace-split tokens from each tool's
 * canonical signature.  This is deterministic, symmetric, and independent of
 * token ordering — making it robust to minor rewording while being fast (O(n²)
 * in the number of tools, which is bounded in practice by provider limits).
 *
 * The first tool encountered in stable input-iteration order becomes the
 * cluster representative; subsequent tools in the same cluster are dropped.
 */
import type { Tool } from "../types/index.js";
import type { ToolDedupConfig, ToolDedupResult } from "../types/index.js";
/**
 * Build a canonical, order-insensitive signature string for a named tool.
 *
 * The signature is composed of:
 *   - the tool's name
 *   - a normalised description (lowercased, whitespace-collapsed)
 *   - sorted parameter property names (with types when available)
 *
 * Stable regardless of property declaration order in the schema.
 */
export declare function computeToolSignature(name: string, tool: Tool): string;
/**
 * Collapse near-duplicate tools in a name→Tool record.
 *
 * When `options.enabled` is falsy (the default), returns the original record
 * and an empty `removed` array — byte-for-byte unchanged behaviour.
 *
 * When enabled, tools whose token-set Jaccard similarity (over their canonical
 * signatures) meets or exceeds `options.threshold` (default 0.9) are collapsed
 * to a single representative (the first in stable iteration order).
 *
 * Any exception thrown internally returns the ORIGINAL tool set (fail-open).
 */
export declare function dedupeTools<T extends Tool>(tools: Record<string, T>, options: ToolDedupConfig): ToolDedupResult<Record<string, T>>;