Web search gave agents a wider evidence surface
When models gained web search, the world became both more available and more hostile. An agent could find fresher information, but it also had to decide which pages deserved trust, which instructions were malicious and how to show the path from source to answer.
Search is not knowledge. It is a moving evidence surface. The agent must preserve citations, dates and uncertainty while resisting pages designed to redirect its behavior. Research quality depends as much on source handling as on language fluency.
