The phrase "action was unwarranted" is correct and usable in written English.
It can be used to describe a situation where an action taken is deemed unnecessary or unjustified.
Example: "The committee concluded that the action was unwarranted and recommended a review of the policies in place."
Alternatives: "action was unjustified" or "action was uncalled for".
To the extent director compensation is aligned with or is below the average of the applicable peer group, companies may determine that immediate action is unwarranted.
Leaders of several other public research universities and the interest group that represents them said Trump's proposed action is unwarranted.
Chavern said his group had warned the company's owners, New York-based One Rock Capital Partners, that its actions were "unwarranted" and would "ultimately be extremely detrimental to the business they say they serve".
Winston Churchill condemned the shooting as "monstrous". The government was forced to institute an inquiry commission, where the unrepentant general acknowledged that his principal aim was not to disperse the crowd but to produce a "moral effect". The colonial government of India determined that General Dyer's actions were unwarranted and dismissed him from service.
Uncertainty Does Not Call For Inaction: special issue from 2007 of the web journal Economists' Voice - The climate scientist Michael Tobis (link not possible) points-out that It is interesting that this idea that costly actions are unwarranted if the dangers are uncertain is almost unique to climate.
Peter Cummings, once head of commercial lending at Bank of Scotland, is the only HBOS executive to have faced official sanction from the now-defunct Financial Services Authority (FSA) – an action he complains was unwarranted scapegoating.
"We can't keep on giving him the benefit of the doubt, knowing the ways in which they manipulate intelligence". Kucinich, who has been a vocal opponent of the war in Iraq since before it began, accused his rivals of embracing the use of military action where it was unwarranted.
"The criticism was unwarranted.
Whatever; his confidence was unwarranted.
