hg tag in clean repo

[TK Soh]

I wonder if anyone can explain the behavior of 'hg tag' in the repo
with no checkout. My experiment show something like this:

    $ hg tip
    changeset:   4353:1ccd3b9a7b1f
    tag:         tip
    parent:      4349:69109aa0cddd
    parent:      4352:5e857d72d3ac
    user:        Alexis S. L. Carvalho <alexis at cecm.usp.br>
    date:        Mon Apr 16 13:31:15 2007 -0300
    summary:     Merge with crew-stable.

    $ hg tag MYTAG

    $ hg tip
    changeset:   4354:a2fc660eb634
    tag:         tip
    parent:      -1:000000000000
    user:        TK Soh <teekaysoh at yahoo.com>
    date:        Tue Apr 17 12:09:15 2007 -0500
    summary:     Added tag MYTAG for changeset 1ccd3b9a7b1f

    $ hg heads
    changeset:   4354:a2fc660eb634
    tag:         tip
    parent:      -1:000000000000
    user:        TK Soh <teekaysoh at yahoo.com>
    date:        Tue Apr 17 12:09:15 2007 -0500
    summary:     Added tag MYTAG for changeset 1ccd3b9a7b1f

    changeset:   4353:1ccd3b9a7b1f
    tag:         MYTAG
    parent:      4349:69109aa0cddd
    parent:      4352:5e857d72d3ac
    user:        Alexis S. L. Carvalho <alexis at cecm.usp.br>
    date:        Mon Apr 16 13:31:15 2007 -0300
    summary:     Merge with crew-stable.


Is this is the intended behavior?