export interface ToolFunction {
    name: string;
    description?: string;
    parameters?: {
        type: "object";
        properties?: Record<string, unknown>;
        required?: string[];
        [key: string]: unknown;
    };
}
export interface Tool {
    type: "function";
    function: ToolFunction;
}
/**
 * Cleans up tool definitions to ensure strict JSON Schema compliance.
 *
 * Implements "require" logic and advanced normalization:
 * 1. Filters 'required' array to remove properties that don't exist in 'properties'.
 * 2. Injects a placeholder property for empty parameter objects.
 * 3. Flattens 'anyOf' with 'const' values into 'enum'.
 * 4. Normalizes nullable types (array types) to single type + description.
 * 5. Removes unsupported keywords (additionalProperties, const, etc.).
 *
 * @param tools - Array of tool definitions
 * @returns Cleaned array of tool definitions
 */
export declare function cleanupToolDefinitions(tools: unknown): unknown;
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