fixup! Add support for _meta field on tool schema

Author: tuntisz

lib/mcp/tool.rb

@@ -17,10 +17,10 @@ def call(*args, server_context: nil)
       def to_h
         result = {
           name: name_value,
+          title: title_value,
           description: description_value,
           inputSchema: input_schema_value.to_h,
         }
-        result[:title] = title_value if title_value
         result[:_meta] = metadata_value if metadata_value
         result[:annotations] = annotations_value.to_h if annotations_value
         result