President Trump’s Board of Peace published on Friday what officials described as the text of a 15-point Gaza deal calling for Hamas and other Palestinian factions to give up their weapons and Israel to withdraw its troops from the territory.

The text says the parties have two weeks to determine a schedule, which an international verification committee can extend.

In its initial response, Hamas said on Friday that the “first step” would be for Israel to commit to ending attacks, and linked the turnover of what the group called “heavy weapons” to a list of other conditions.

In underlining that Israel must first make concessions for the disarmament deal to move ahead, Hamas highlighted how challenging it will be to carry out the new agreement, which caught many by surprise when President Trump announced it on Thursday.

Experts and officials have raised questions about whether Hamas and Israel will follow through in implementing the agreement.

Nickolay Mladenov, the Board of Peace’s high representative for Gaza, wrote on social media that “implementation and verification have to be real.”

“Withdrawal must move in lock step with decommissioning,” he wrote, referring to the withdrawal of Israeli troops from Gaza and the disarmament of Palestinian armed groups.

The Israeli government still has not issued a formal statement on Mr. Trump’s announcement. On Thursday evening, the government, citing an anonymous “diplomatic official,” said Israel had conveyed reservations to Tony Blair, the former British prime minister who serves as a top official on the Board of Peace, the international organization that has been negotiating with Hamas and Israel on Gaza’s future.

Hamas’s weapons have been a key sticking point over months of talks in Egypt, one of the main mediating countries. The Board of Peace has demanded that the group gradually give up all of its arsenal — a position that Israeli officials have contended Hamas will not accept.

Armed struggle against Israel has long been central to Hamas’s ideology and a means to stay in power. Many members of the group view any deal in which they would give up their weapons as tantamount to surrender.

Isabel Kershner contributed reporting to this article.