As the mayoral primary nears, the speaker of the City Council, Gifford Miller, will increasingly be sized up on how successful he has been in carrying out his agenda.

All but one of Mr. Miller’s likely Democratic opponents holds public office, but the speaker is in the unique spot of going head-to-head with the mayor regularly and is the only one who rules over at least some of City Hall’s terrain, leaving Mr. Miller more vulnerable to critics.

In the 10 months since Mr. Miller’s last state-of-the-city speech, the 35-year-old has made good on some promises, including winning an earned-income tax credit for roughly 700,000 low-income city residents and passing a bill to require the presence of a nurse in every public and private school with at least 200 students.

But there are also items he has yet to check off on his to-do list, and others he has been unable to accomplish.

In the February speech he called for a permanent 2-percentage-point reduction in the property tax rate and the full repeal for senior-citizen homeowners on fixed incomes of the 18.5% hike imposed in 2003.

The call for a permanent reduction was praised by many policy experts for its ability to deliver tax relief to a broad base, but the speaker did not have full support from the council and instead agreed to Mayor Bloomberg’s plan: a $400 rebate for homeowners.

A senior fellow at the Manhattan Institute, E.J. McMahon, who disagrees with Mr. Miller on almost all issues, said yesterday the speaker was on the right side of that debate, but he was cornered.

“He was unable to deliver because too many of his members found the rebate irresistible,” Mr. McMahon said. “The mayor had him boxed. The problem was that Miller didn’t put enough behind it. He pushed it as hard as he could, but he didn’t have enough to counter the political appeal of the mayor’s position.”

Some political observers said that allowing the hike to stand could leave an opening for the speaker’s opponents in the Democratic primary. They are expected to include a former borough president of the Bronx, Fernando Ferrer; Rep. Anthony Weiner; Manhattan Borough President Virginia Fields; Council Member Charles Barron, and perhaps City Comptroller William Thompson Jr.

Mr. Miller, who called the $400 rebate a “gimmick” and a “page torn straight from the Bush playbook,” predicted yesterday that it would help, not hurt him in the campaign.

“I see it more as a liability for the mayor,” Mr. Miller said. “Look, I would have liked to have accomplished everything, but there has never been a negotiation where you get 100% of what you want and the other guy doesn’t get anything he wanted. That’s how negotiations work.” In the end, he said, he wanted to restore the funds the mayor had proposed to eliminate to social service programs.

The council has passed several of the bills he promised. One requires the Department of Education to publish crime data on the Internet and to determine which schools need security cameras. His colleagues are, however, still hashing out the gun-control package Mr. Miller promised, which among other things limit gun purchases to one every 90 days. The council has yet to take on the prescription-drug card Mr. Miller proposed, to provide low-income residents with discounts, and it seems to be stalled on a bill to allow off-duty police officers to moonlight at working to control noise outside bars, a measure adamantly opposed by Police Commissioner Raymond Kelly.

“I’d just like to see a vote on it,” said Council Member David Yassky, who introduced the bill. “There’s no question that it’s a genuine problem. I think Ray Kelly is a terrific police commissioner, but I don’t think his opposition is enough of a reason to hold it up when there seems to be support for it.”

Mr. Miller said yesterday the bill needed support from Mr. Kelly to be effective, but he remained committed to passing it, and to creating the prescription drug card.

One council member, who did not want to be named, said there was no reason to have so many lingering items and said “the agenda isn’t all that ambitious to begin with.”

“That speech was almost a year ago,” the council member said. “The only way he gets close to these accomplishments is if you count the things that are not yet done but are still in progress.”

A political science professor at Baruch College, Douglas Muzzio, said Mr. Miller did a good job on budget restorations, but the council lacks have enough power to provide anyone with hefty legislative accomplishments.

“If you’re looking for mega-accomplishments you’re not going to find them in the City Council, because the council doesn’t do mega-accomplishments,” Mr. Muzzio said. “Their power is weak vis-a-vis the mayor and Albany.”