The muted response in the Gulf came after the rulers of Qatar and Kuwait met Saudi King Abdullah over the weekend to discuss regional issues, foremost Iran.
Saudi Arabia and Iran's regional enmity increasingly has played out as a proxy war in Syria with both countries providing lethal support for the warring sides.
Saudi Arabia also accuses Iran of backing Shiite unrest across the region.
Bucking the trend, the tiny Gulf countries of Bahrain and the United Arab Emirates praised the agreement. Hamas called the deal a sign of Iran's rising power and prominence.