How can i add a tool to SQL Server as a add-in(plug-in)

I have developed a tool which you can use to convert XML(DTD or XML Schema) to relational database model. I want to add it to SQL Server.

Can i do it?

If you are asking if you can install a plug-in to Management Studio (SSMS) the answer is no. Currently SSMS is locked down. For the next release of SQL Server we are investigating how to expose a full extensibility interface.

Cheers,
Dan