Sql-server – Add job using tsql related

When using sp_add_jobstep, are there any limits on @command when I choose @subsystem to 'TSQL', say, maybe I can only set @command to some simple, single tsql like:

'select * from o2o.dbo.sth'

Or could it be complicated like this?:

use hxo2o 
go
begin
  declare @last_sync_date_updater nvarchar(2000)
  declare @tb_name nvarchar(200)
  declare tb_name_cur cursor for
    select table_name from dbo.o2o_tables

  open tb_name_cur
  fetch next from tb_name_cur into @tb_name

  while @@fetch_status = 0
  begin
    set @last_sync_date_updater =
        'update dbo.o2o_tables set table_last_sync_date = (select '
        + case
        when @tb_name = 'trace_user_actions' then 'max(operation_date_time)'
        else ' dbo.InlineMax(max(create_time), max(update_time)) ' end
        + 'from dbo.' + @tb_name + ')'

    exec (@last_sync_date_updater)

    fetch next from tb_name_cur into
    @tb_name
  end
close tb_name_cur
deallocate tb_name_cur
end

If not, should I use another @subsystem instead? Or some other methods? I tried to google and stack for the issue but labor in vain.