@@ -1,7 +1,7 @@
 {
   "name": "@anthropic-ai/mcpb",
   "description": "Tools for building MCP Bundles",
-  "version": "2.1.1",
+  "version": "2.1.2",
   "type": "module",
   "main": "dist/index.js",
   "module": "dist/index.js",
 
@@ -188,7 +188,8 @@
       },
       "required": [
         "type",
-        "entry_point"
+        "entry_point",
+        "mcp_config"
       ],
       "additionalProperties": false
     },
 
@@ -37,8 +37,7 @@ export const McpbManifestMcpConfigSchema = McpServerConfigSchema.extend({
 export const McpbManifestServerSchema = z.strictObject({
   type: z.enum(["python", "node", "binary", "uv"]),
   entry_point: z.string(),
-  // mcp_config is optional for UV type (UV handles execution)
-  mcp_config: McpbManifestMcpConfigSchema.optional(),
+  mcp_config: McpbManifestMcpConfigSchema,
 });
 
 export const McpbManifestCompatibilitySchema = z.strictObject({
Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,7 @@`
`1`	`1`	`{`
`2`	`2`	`"name": "@anthropic-ai/mcpb",`
`3`	`3`	`"description": "Tools for building MCP Bundles",`
`4`		`- "version": "2.1.1",`
	`4`	`+ "version": "2.1.2",`
`5`	`5`	`"type": "module",`
`6`	`6`	`"main": "dist/index.js",`
`7`	`7`	`"module": "dist/index.js",`