Agents find the passage on your site, not just the page
When an agent searches your own content, it now gets the matching passages from your pages, ranked by relevance, so the right sentence on a long page isn't missed.
When an agent searches your site's content, in the app or from Slack, it now searches the passages within your pages rather than whole pages. The agent finds a pricing limit halfway down a long docs page and gets that passage with its heading, so drafts quote the right part of your site.
The matching passages are ranked by a reranking model before the agent reads them. Each ranking is charged to the run's agent credits at what the provider billed, typically about 0.0013 credits per search. A ranking that fails isn't charged.
While some of your project's pages are still being indexed, agents search whole pages as before, and nothing is ranked or charged. Read Owned-content reranking.