This Swati Tirunal kriti is very dear to me because my guru Sangeetacharya Sri C.S. Krishna Iyer was directly involved in tuning it. He worked very closely with Sri Semmangudi Srinivasa Iyer on tuning several Swati kritis. This one, if I am not mistaken, was one of the kritis that Sri Krishna Iyer undertook wholly.
Composed in praise of Sri Padmanabha, the kriti's meaning is as follows (courtesy: Compositions of Maharaja Sri Swati tirunal by Sri T.K. Govinda Rao)
I worship the beautiful lad of Nanda. O' the foremost, your lotus feet are worshipped by Brahma. He is the gem of the moon dynasty, He has a moon-like face, He is the destroyer of all sins. He punishes those who touble mother Earth. He is Lord Padmanabha, worshipped by blemishless minds.
You can listen to this kriti here: