The phrase "agreement expanded" is correct and usable in written English.
It can be used in contexts where a previously established agreement has been broadened or made more comprehensive.
Example: "The terms of the contract were revised, and the agreement expanded to include additional services."
Alternatives: "agreement broadened" or "agreement enhanced".
That agreement expanded on a 2009 settlement with the company over exaggerated health claims for another cereal, Frosted Mini-Wheats, which the company had advertised as "clinically shown to improve kids' attentiveness by nearly 20 percent".
November's cease-fire agreement expanded the permissible fishing zone to six nautical miles off the Gaza coast, from three, and provided Palestinians access to land near the Israeli borders that had been closed off.
To help Mr. Boehner sell the measure, the final agreement expanded the definition of "security-related" spending to include departments beyond the Pentagon, spreading out potential cuts to the Department of Homeland Security and other agencies, officials said.
The border region is historically one of the poorest in the nation, with high rates of unemployment, yet there was significant economic investment in the 1990's as the North American Free Trade Agreement expanded trade between Mexico and the United States.
The agreement expanded in 2014 and again two years later, securing DGIST half of the time on one of LBNL's X-ray microscopy beamlines, which its researchers used to explore nanomaterials — a coup for a new and little-known institution, say researchers.
Although it was possible to receive a bachelor's degree in management from Marshall's Lewis College of Business, the agreement expanded the program to nine degrees in the business college.
The agreement expands Chinese legal studies at Cornell.
The agreement expands scientific and technical cooperation between Israel and the United States in the energy area.
The agreement expands previous, separate deals between DaimlerChrysler and America Online, Time Inc. and the Turner Broadcasting System.
Google agreement expands digital scanning of millions of Stanford library books.
This engineering-oriented agreement expands the university's relationship with India.
