Not every additional qualification is iḥtirās. The preceding expression must allow a plausible inference contrary to what the speaker intends, and the added wording must actually remove that risk. If no such misleading implication exists, the expression may be useful but should not automatically be classified as safeguarding.
For example: «أَعْطِ الفَقِيرَ مِنْ مَالِكَ عَنْ طِيبِ نَفْسٍ»
Give the poor person from your wealth willingly.
The appended manner phrase might serve iḥtirās if the context risks suggesting grudging or resentful giving. The rhetorical classification depends on the inference being prevented, not merely the presence of an adverbial phrase.