MultiBaas MCP Server

// src/common/schema.ts import { z } from "zod"; import { zodToJsonSchema as originalZodToJsonSchema } from "zod-to-json-schema"; /** * Traverses a JSON Schema object and ensures all array types have a valid "items" property. * This is a direct fix for VS Code's strict schema validation that requires all array types * to have an "items" property. * * @param obj The JSON schema object to fix * @returns The fixed schema */ function fixArrayItems(obj: any): any { if (!obj || typeof obj !== "object") { return obj; } // Fix array type with missing items property if (obj.type === "array" && !obj.items) { // Add a default items definition - string type is a safe fallback obj.items = { type: "string" }; } // Recursively process all properties if (!Array.isArray(obj)) { for (const key in obj) { if (typeof obj[key] === "object" && obj[key] !== null) { obj[key] = fixArrayItems(obj[key]); } } } else { // Process array elements for (let i = 0; i < obj.length; i++) { if (typeof obj[i] === "object" && obj[i] !== null) { obj[i] = fixArrayItems(obj[i]); } } } return obj; } /** * Enhanced version of zodToJsonSchema that fixes array types for VS Code compatibility. * This addresses the "tool parameters array type must have items" error in VS Code's MCP schema validation. * * @param zodSchema The Zod schema to convert * @param options Options for the original zodToJsonSchema function * @returns A VS Code-compatible JSON Schema */ export function zodToJsonSchema( zodSchema: z.ZodType, options?: Parameters<typeof originalZodToJsonSchema>[1], ) { // Get the original JSON schema const jsonSchema = originalZodToJsonSchema(zodSchema, options); // Fix any array types that don't have items property return fixArrayItems(jsonSchema); }