إِنَّمَا أُرِيدُ الْإِصْلَاحَ.
I seek only reform.
“Innamā” provides a form of restriction. The speaker limits the stated aim to reform, possibly correcting a suspicion about another aim. Without context we cannot identify which suspicion, if any, was held by the listener.
Classifying the restriction as ifrād, qalb or taʿyīn depends on the listener’s prior assumption. The restrictive form alone does not identify which of those pragmatic subtypes is operative.