/usr/share/applications/mtpaint.desktop is in mtpaint 3.40-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | [Desktop Entry]
Version=1.0
Name=mtPaint graphic editor
GenericName=Painting program
Comment=painting program to create pixel art and manipulate digital photos
Comment[es_ES]=programa de pintura para crear pixel art y manipular fotos digitales
Comment[pt_BR]=programa de pintura para criar pixel art e manipular fotos digitais
Type=Application
Exec=mtpaint
Icon=mtpaint
Categories=Graphics;RasterGraphics;
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