Contractor shall indemnify, defend, and hold harmless Client and its affiliates from any and all claims, losses, liabilities, damages, costs, and expenses arising out of or related to the Services, regardless of cause, including claims resulting in whole or in part from Client's acts, omissions, or business decisions.
The contractor could be responsible for almost any claim connected to the project, even if the client contributed to the problem. The clause also requires the contractor to pay defense costs, which can become expensive quickly.
Ask to narrow this to third-party claims caused by the contractor's breach, negligence, or willful misconduct. Consider adding a liability cap and excluding claims caused by the client's own acts or instructions.