"I went to the three locations and there were [a] maximum [of] 250 people at each one," he said.
"They showed that they can put together the package - there were tents, water, basic supplies."
An Asian diplomat who went on the tour said they had been shown around by helicopter.
"The ambassadors themselves looked around the affected Irrawaddy delta area in the morning hours," he said on condition of anonymity.
"It was not good enough to get a clear picture of the damage in the area."
The international community has been turning up the pressure on
the country's military rulers, who have been criticised for holding
up visas for foreign disaster experts and insisting on managing the
relief effort alone.
With up to 2.5 million people facing dire shortages of food, water, shelter and medical care, according to international agencies, there have been signs that the military government is easing some constraints on the operation.
On Friday, Myanmar state television reported that the death toll from cyclone Nargis has reached 77,738.
It also reported that another 55,917 peope are missing and 19,359 are injured.
The military, which has ruled Myanmar since 1962, is deeply suspicious of the outside world and has appeared to fear anything that could weaken its control.
But on Saturday, 30 Thai medics flew into the country as part of a group of more than 100 Asian medical workers who the military government is allowing to treat victims of the storm, a Thai health official said.
Louis Michel, the European Union's humanitarian aid commissioner, however, said that after two days of talks the military government had refused to open an airport in the Irrawaddy delta to aid flights, currently going to the main city Yangon.
The UN is warning that 2.5 million people are facing hunger and disease in the wake of the cyclone.
But instead of giving out aid, the government is dishing out eviction orders.
Hundreds of displaced villagers taking refuge at a sports hall in Yangon have been told they must go, an Al Jazeera correspondent on the ground reported.
Army officers told them they had 24 hours to leave, without explaining why or telling them where they could go.