"tool of manipulation" is a correct and usable phrase in written English.
You can use it to describe a strategy or technique that is used to influence or persuade someone to do something. For example, you might write, "He used a tool of manipulation to convince his employees to work harder."
Endless apologising is a tool of manipulation (and passive aggression).
He also used my addiction as a tool of manipulation to ensure complete control over me and make sure that I did not leave.
In the idiom of "new politics", spin is a tool of manipulation practised by careerist special advisers of the Westminster elite.
Cindy Southworth, a vice president of the National Network to End Domestic Violence, points out that when a relationship goes bad, threats become both a tool of manipulation and a reliable predictor of physical assault.
It is nothing more than a tool of manipulation.
So Islamophobia is manufactured and a tool of manipulation, endangering not only Muslims, but the health of our democracy.
Beyond providing a new set of tools for manipulation of gene expression selectively in GFP cells, we found that GFP can be used to reconstitute the activity of a protein not known to have a modular structure, suggesting that this strategy might be applicable to a wide range of proteins.
Nor can it be regarded by nationalists as a tool of foreign manipulation.
Successful control of such universally visible media then becomes an important tool of information manipulation, which, in turn, eases the problem of controlling the population.
Perhaps what this tells us is that food is, in a sense, too important, too deeply rooted in our history and culture, to be an acceptable tool of political manipulation.
But some government critics say the investigation, which is led by pro-government forces within the judiciary, has become a tool of political manipulation intended to punish a wide range of vocal critics of the government.
