/**
 * JSON Schema utilities for tool parameter definitions.
 *
 * Provides helpers for extracting and normalizing JSON Schema from tool
 * parameters, including provider-specific cleaning (e.g., Gemini).
 *
 * Reimplemented from OpenClaw's schema handling.
 * Original source: openclaw/src/agents/pi-tool-definition-adapter.ts (MIT license)
 *
 * @module
 */
import type { Tool } from "../types.js";
/**
 * Extract a JSON Schema tool definition suitable for sending to an LLM.
 *
 * @param tool - The tool to extract schema from.
 * @returns An object with name, description, and input_schema.
 */
export declare function extractToolSchema(tool: Tool): {
    name: string;
    description: string;
    input_schema: Record<string, unknown>;
};
/**
 * Normalize a parameter schema to ensure it's a valid JSON Schema object type.
 *
 * Ensures the root is always `type: "object"` with `properties`.
 */
export declare function normalizeSchema(schema: unknown): Record<string, unknown>;
/**
 * Clean a JSON Schema for Gemini compatibility by stripping unsupported keywords.
 *
 * @param schema - The schema to clean.
 * @returns A new schema with unsupported keywords removed.
 */
export declare function cleanSchemaForGemini(schema: Record<string, unknown>): Record<string, unknown>;
/**
 * Extract tool schemas from an array of tools, ready for LLM submission.
 *
 * @param tools - Array of tools.
 * @param providerOrApi - Optional provider name **or** API transport string for
 *   provider-specific schema cleaning. Accepts either `connector.provider`
 *   (e.g. `"google"`) or `connector.api` (e.g. `"google-generative-ai"`,
 *   `"google-gemini-cli"`, `"google-vertex"`). When either matches a known Google transport, Gemini-
 *   incompatible JSON Schema keywords are stripped from the schemas.
 * @returns Array of tool schema objects.
 */
export declare function extractToolSchemas(tools: Tool[], providerOrApi?: string): Array<{
    name: string;
    description: string;
    input_schema: Record<string, unknown>;
}>;
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