Banks seek to rein in soaring AI agent costs, McKinsey says

* Token expenses may reach 20% of banks' total labor costs, McKinsey report says* Most banks block AI agents from making transactions over potential liability* Wide use of AI agents by retail banking customers expected within three years, McKinsey report saysBy Tatiana BautzerNEW YORK, Nov 10 (Reuters) - Banks worldwide are trying to curb the soaring cost of AI agents as spending on the tokens that power them could…