Damascus quickly embraced a Russian plan for it to hand over its chemical arsenal.
The initiative defused talk of a strike, but if the regime breaks its pledge, it could provide the United States with a justification to go to war.
If it implements the plan to turn over its weapons for destruction and join a chemical arms ban, "it would show that Syria backs off when challenged militarily," said Volker Perthes of the German Institute for International and Security Affairs.
Foreign Minister Walid Muallem announced yesterday that Syria is ready to give other countries and the United Nations access to its arsenal, for the first time officially confirming it possesses such weapons.
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As US President Barack Obama rushed to gain congressional support to strike Assad's regime, Russian Foreign Minister Sergei Lavrov met with Muallem in Moscow and proposed that Damascus hand over its chemical arms.
Talk of a strike came after an alleged chemical attack near Damascus on August 21 that the Syrian opposition claimed killed some 1,400 people.
More than 110,000 people have been killed in the conflict since then, and millions forced to flee their homes.
Perthes said Syrian cooperation now with the international community "which leads to handing over the weapons, yes, indeed, that would weaken Assad."
"It wouldn't change the situation on the ground directly, but he would appear weaker, which would give some boost to the opposition."
But he said he was skeptical that the Syrian leader would comply, adding that Assad was more likely to use the move to buy time.
Karim Bitar of the French Institute of International and Strategic Studies was equally sceptical of the regime's intentions.
"The big question is: will the regime really put its chemical weapons under international control?" Bitar told AFP.
"We need to see whether the regime isn't just doing what it usually does, which is to try to manipulate the international community," he added.