As CEO Mark Zuckerberg prepares to testify before Congress next week to answer questions about the company’s privacy and data policies, Facebook announced a slew of changes to its APIs.

The changes don’t come as a surprise — Facebook already announced that it was conducting an audit of “all apps that had access to large amounts of information before we changed our platform in 2014.” But the new restrictions hit quite a number of APIs: specifically, the Events, Pages, Groups, and Instagram APIs. Here are some of the most notable changes:

• Access to the Events, Groups, Pages and Instagram APIs is shut off to new developers.
• Starting today, all apps that have access or seek to gain access to the Events, Groups, and Pages APIs must undergo a formal app review. That means apps that currently have access to the Events and Groups APIs will lose access while their review is underway.
• Facebook is also shutting down part of the Instagram API, which was originally scheduled for depreciation on July 31.
• Apps seeking to use the Groups API will first have to receive approval from a group admin to “ensure that they are benefitting the group.”
• Facebook will be approving access to the Pages API going forward on the basis of whether the apps are “providing useful services to our community.”
• Access to the guest list of an event or posts written by attendees on the event wall will no longer be available to apps using the Events API.

The company also announced that starting on Monday, a link will appear at the top of users’ News Feed directing them to a page where they can see how much of their data is being shared with third-party apps.

The new restrictions align clearly with one of Zuckerberg’s favorite talking points — that Facebook wants to give people the tools to build better communities. But it’s not clear exactly how Facebook will determine whether an API “wants to benefit the group” or how Facebook will work with admins to ensure that goal.

When it comes to changes made to the Group API, a Facebook spokesperson said via email, “Our goal is to support these apps in a way that meets the needs of admins, while also better protecting the privacy of group members. We are collecting feedback from admins primarily through our Power Admins Groups and at Community Leadership Circles, which we launched earlier this year.”

On a conference call with reporters, Zuckerberg said the goal of the changes was to ensure that users could still share the data they choose with apps they want to log into, but “anything that might also share other people’s information — those should be more restricted.” You can also read more about the immediate changes made to APIs here.