Access object definition of linked server from source server.
Syntax to execute sp_Helptext on Linked server
EXEC [LINKEDSERVER].[DATABASE].dbo.sp_Helptext ‘OBJECTNAME‘
Object name could be procedure,view
Syntax to Execute sp_Help on Linked server
EXEC [LINKEDSERVER].[DATABASE].dbo.sp_Help ‘OBJECTNAME‘
Obejct name could be table, procedure, view
Hope this helps!