AI agents promise to make our lives easier by booking flights, shopping online, managing emails and completing tasks on our behalf. But some of the biggest websites are pushing back.From Amazon restricting AI shopping agents to concerns around Perplexity's Comet, we look at why companies are limiting automated access to their platforms.Is it about security, privacy and protecting customer data, or maintaining control over how we use the internet?And if AI agents need permission from websites to work, how useful can they really become?