diff --git a/lib/mcp/resource.rb b/lib/mcp/resource.rb
index 5b985a93..b0c66e59 100644
--- a/lib/mcp/resource.rb
+++ b/lib/mcp/resource.rb
@@ -5,7 +5,7 @@ module MCP
   class Resource
     attr_reader :uri, :name, :description, :mime_type
 
-    def initialize(uri:, name:, description:, mime_type:)
+    def initialize(uri:, name:, description: nil, mime_type: nil)
       @uri = uri
       @name = name
       @description = description