select
    u.name,
    o.name,
    case (o.type) when 'S' then 'SYSTEM TABLE' else 'TABLE' end,
    (
    select convert(varchar( 8000 ), value)
    from ::fn_listextendedproperty(NULL, 'user', u.name, 'table', o.name, null, null)
    where name = 'MS_Description'
    )
from
    sys.sysobjects o
    join sys.schemas  u on (u.schema_id = o.uid)
where
    o.type in ('U', 'S')
    and u.name = 'dbo'

Msg  102 , Level  15 , State  1 , Line  7 
Incorrect syntax near 'u'.

select
   u.name,
   o.name,
   case (o.type) when 'S' then 'SYSTEM TABLE' else 'TABLE' end,
	(
	select convert(varchar( 8000 ), ep.value)
		from [%CATALOG%.]sys.extended_properties ep
		where
			ep.major_id = o.id
			and ep.class =  1 
			and ep.minor_id =  0 
			and ep.name = 'MS_Description'
	) as coln
from
   [%CATALOG%.]sys.sysobjects o
   join [%CATALOG%.]sys.schemas  u on (u.schema_id = o.uid)
where
   o.type in ('U', 'S')
[  and u.name = %.q:OWNER%]
order by  1 ,  2 

select
    u.name,
    o.name,
    c.column_id,
    c.name,
    case when c.system_type_id in ( 165 ,  167 ,  231 ) and c.max_length = - 1  then t.name + '(Max)' else t.name end,
    c.precision,
    case (c.max_length) when - 1  then  0  else case when c.system_type_id in ( 99 ,  231 ,  239 ) then (c.max_length/ 2 ) else (c.max_length) end end as colnA,
    c.scale,
    case(c.is_computed) when  1  then convert(varchar( 8000 ), (select z.definition from [%CATALOG%.]sys.computed_columns z where z.object_id = c.object_id and z.column_id = c.column_id)) else '' end as colnB,
    case(c.is_nullable) when  1  then 'NULL' else 'NOTNULL' end,
    case(c.is_identity) when  1  then 'identity' else '' end,
    case when(c.user_type_id <> c.system_type_id) then (select d.name from [%CATALOG%.]sys.types d where d.user_type_id = c.user_type_id) else '' end as colnC,
    convert(varchar( 8000 ), d.definition),
    case (c.is_identity) when  1  then convert(varchar, i.seed_value) + ', ' + convert(varchar, i.increment_value) else '' end as colnD,
	(
	select convert(varchar( 8000 ), ep.value)
	from [%CATALOG%.]sys.extended_properties ep
	where
		ep.major_id = c.object_id
		and ep.minor_id = c.column_id
		and ep.class =  1 
		and ep.minor_id !=  0 
		and ep.name = 'MS_Description'
	) as colnE,
    c.collation_name,
    case (i.is_not_for_replication) when  1  then 'true' else 'false' end,
    d.name,
    case(c.is_rowguidcol) when  1  then 'true' else 'false' end
from
    [%CATALOG%.]sys.columns      c
    join [%CATALOG%.]sys.objects o on (o.object_id = c.object_id)
    join [%CATALOG%.]sys.schemas u on (u.schema_id = o.schema_id)
    join [%CATALOG%.]sys.types   t on (t.user_type_id = c.system_type_id)
    left outer join [%CATALOG%.]sys.identity_columns i on (i.object_id = c.object_id and i.column_id = c.column_id)
    left outer join [%CATALOG%.]sys.default_constraints d on (d.object_id = c.default_object_id)
where 
   o.type in ('U', 'S', 'V')
[  and u.name = %.q:OWNER%]
[  and o.name=%.q:TABLE%]
order by  1 ,  2 ,  3