fix: make JSON Schema to Zod conversion recursive for array/object types

mcpServer.js

@@ -21,6 +21,35 @@ dotenv.config({ path: path.resolve(__dirname, ".env") });
 
 const SERVER_NAME = "webex-messaging-mcp-server";
 
+/**
+ * Convert a single JSON Schema type definition to a Zod type (recursive)
+ */
+function jsonSchemaTypeToZod(prop) {
+  if (!prop || typeof prop !== 'object') {
+    return z.any();
+  }
+
+  if (prop.type === 'string') {
+    return z.string();
+  } else if (prop.type === 'number') {
+    return z.number();
+  } else if (prop.type === 'integer') {
+    return z.number().int();
+  } else if (prop.type === 'boolean') {
+    return z.boolean();
+  } else if (prop.type === 'array') {
+    const itemSchema = prop.items ? jsonSchemaTypeToZod(prop.items) : z.any();
+    return z.array(itemSchema);
+  } else if (prop.type === 'object') {
+    if (prop.properties) {
+      return z.object(convertJsonSchemaToZod(prop.properties, prop.required || []));
+    }
+    return z.record(z.any());
+  } else {
+    return z.string();
+  }
+}
+
 /**
  * Convert JSON Schema properties to Zod schema format
  * Required by MCP SDK v1.17.4 for proper parameter validation
@@ -33,24 +62,7 @@ function convertJsonSchemaToZod(properties, required = []) {
   const zodSchema = {};
 
   for (const [key, prop] of Object.entries(properties)) {
-    let zodType;
-
-    if (prop.type === 'string') {
-      zodType = z.string();
-    } else if (prop.type === 'number') {
-      zodType = z.number();
-    } else if (prop.type === 'integer') {
-      zodType = z.number().int();
-    } else if (prop.type === 'boolean') {
-      zodType = z.boolean();
-    } else if (prop.type === 'array') {
-      zodType = z.array(z.any());
-    } else if (prop.type === 'object') {
-      zodType = z.object({});
-    } else {
-      // Default to string for unknown types
-      zodType = z.string();
-    }
+    let zodType = jsonSchemaTypeToZod(prop);
 
     // Make optional if not in required array
     if (!required.includes(key)) {