The best suggestions for protect the metadata of datasource?

[xuzm]

when I customize the Authentication/Authorization checks in my application through customize the " com.isomorphic.servlet.IDACall", I just want to know your suggestions about protecting the metadatas of datasources. If I should to protect them, how should I do?
I found if I used the tag <script src="test/sc/DataSourceLoader?dataSource=supplyItem,animals,employees"></script>, the browser would download the all the metadatas.

[Isomorphic]

Potentially sensitive information (like SQL customizations or java class names) is automatically omitted when the DataSource is delivered to the browser.

The rest of the metadata is not a security risk, it just reflects the structure of the data as is already obvious to the user from the columns in a grid or fields in a form.