/**
 * L5 Schema Validator
 *
 * Validates tool parameters against schemas.
 * Detects injection attacks and type coercion.
 */
import { ToolDefinition, SchemaValidatorResult, GuardLogger } from "../types";
export interface SchemaValidatorConfig {
    strictTypes?: boolean;
    detectInjection?: boolean;
    sanitizeStrings?: boolean;
    logger?: GuardLogger;
}
export declare class SchemaValidator {
    private strictTypes;
    private detectInjection;
    private sanitizeStrings;
    private logger;
    constructor(config?: SchemaValidatorConfig);
    /**
     * Validate parameters against tool schema
     */
    validate(tool: ToolDefinition, params: Record<string, any>, requestId?: string): SchemaValidatorResult;
    /**
     * Validate a single parameter
     */
    private validateParameter;
    private getStrictType;
    private validateString;
    private validateNumber;
    private validateObject;
    private checkPrototypePollution;
    private detectInjectionPatterns;
    private deepScanForInjection;
    private sanitizeString;
}