Rating 0.5 star is okay, but do not add extra "[MTL]" indicator since it's against the rules of this site.
See:
https://ehwiki.org/wiki/Talk:Renaming

The [MTL] indicator may be added by the uploader (or by a rename petition started by the uploader) when they wish to mark their work as a machine translation and should not be removed. This is primarily used as supporting evidence for the rough translation tag.

It should be placed after the translator name/group if applicable, and before any official special indicators. e.g. [English] [Translators] [MTL] [Digital]
If the machine translation status was declared in the title, but the uploader used a different wording from the suggested [MTL] format, the uploader's wording should remain intact.
Example: "(C69) guyacircle, drawn by guya, Haachama Hot Tits!!! digit release (GuyaMachineTL)" should only be standardized to "[guyacircle (guya)] Haachama Hot Tits!!! [Chinese] [GuyaMachineTL] [Digital]"
If the MTL wording in the R and J fields conflicts, and both clearly indicate that the work was machine-translated, use the wording provided by the uploader in the J field.

[MTL] or equivalent should NOT be added when not present unless it is started by a vote from the gallery uploader.

Base +35, Gren92747 -7, CrysisCrafter +6, naming way +35, Glovelove. +44, Sklorpy +38, DJ_Puchuu +17