/**
 * visus_read_excel MCP Tool
 *
 * Reads and sanitizes an Excel workbook (.xlsx or .xls) from a local path or URL.
 * All cell content passes through the IPI injection scanner before being returned.
 *
 * CRITICAL: ALL content MUST pass through the sanitizer. This cannot be bypassed.
 *
 * Pipeline order:
 * 1. Fetch file (local or remote) as binary buffer
 * 2. Parse with SheetJS
 * 3. IPI threat detection on flattened cell content
 * 4. Sanitization (injection detection + PII redaction)
 * 5. Token metrics header
 */
import type { VisusReadExcelInput, VisusReadExcelOutput, Result } from '../types.js';
/**
 * Fetch content as buffer from a local file path or remote URL
 */
declare function fetchBuffer(source: string): Promise<Result<Buffer, Error>>;
/**
 * Format rows as a markdown table
 */
declare function rowsToMarkdownTable(rows: unknown[][], sheetName?: string): string;
/**
 * visus_read_excel tool implementation
 *
 * @param input Tool input parameters
 * @returns Sanitized Excel content with metadata
 */
export declare function visusReadExcel(input: VisusReadExcelInput): Promise<Result<VisusReadExcelOutput, Error>>;
export declare const visusReadExcelToolDefinition: {
    name: string;
    title: string;
    description: string;
    inputSchema: {
        type: "object";
        properties: {
            source: {
                type: string;
                description: string;
            };
            sheet: {
                description: string;
                oneOf: {
                    type: string;
                }[];
            };
            format: {
                type: string;
                enum: string[];
                description: string;
                default: string;
            };
        };
        required: readonly ["source"];
    };
    readOnlyHint: boolean;
    destructiveHint: boolean;
    idempotentHint: boolean;
    openWorldHint: boolean;
};
export { fetchBuffer, rowsToMarkdownTable };
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