The phrase "agreement only by" is not correct and lacks clarity in written English.
It may be used in contexts where you want to specify that an agreement is valid only under certain conditions or terms.
Example: "The contract stipulates that there is an agreement only by mutual consent of both parties."
Alternatives: "agreement solely through" or "agreement exclusively by".
Zecharia Schenkolewski, a lawyer for a woman identified in the plea agreement only by the initial L., said that if necessary the woman would testify against Mr. Katsav in court.
"I often won their agreement only by suggesting that if they carried everything out then it was a great opportunity to spring-clean their house before carrying everything back in.
In the House of Commons on 6 October 1938 she condemned the actions of the prime minister, Neville Chamberlain, in signing the Munich Agreement: "Only by throwing away practically everything for which this country cared and stood could he rescue us from the results of his own policy".
Magnus and Muirchertach went on joint raiding expeditions after the peace agreement, only interrupted by the winter of 1102 03.
Otherwise, officials might spend years negotiating an agreement only to have it rejected by Congress.
"If you aim at consensus you can only do so by stacking the panel with people who have reached a foregone conclusion," he said, or by reaching agreement "only at the lowest common denominator".
In other words, there will not be peace in Afghanistan by having an agreement only between us and the Afghan Taliban.
Mrs. Clinton first offered a ban on soft money to Mr. Lazio in May, but Mr. Lazio rejected it as a "gimmick" until last month, when he pledged to abide by such an agreement only if Mrs. Clinton first pledged the same.
The agreement only recognised reality.
Contract law seeks to protect parties to an agreement not only by requiring formalities but in many other ways as well.
Changing the rates of key formation and consumption reactions for HCN can improve the agreement, but only by making unreasonable changes in these rates.
