Gephyromantis malagasius seems to be the frog in this group that lives in the Masoala peninsula and looks the most like this. But I haven't seen any other photos of frogs quite this lumpy or with the black color above the eyes, so maybe it's something else?
Figure 8; Gephyromantis sp. Ca29 from Andranonafindra in life. Photos show (a–c) ZSM 59/2016 (MSZC 0203), adult male (FGG = 48/47), and (e–g) ZSM 58/2016 (MSZC 0196), adult male (FGG = 42/49). Scale bars indicate 10 mm.