The correct document for outlining the specific tasks, deliverables, and timeline in a vendor agreement is the Statement of Work. This document plays a crucial role in setting clear expectations and project details before work commences, ensuring that both parties are aligned on what is to be delivered, when, and in what manner. An agreement for services, on the other hand, defines the level of service performance and quality assurances rather than detailing the project specifics. A confidentiality agreement focuses on the protection of proprietary and sensitive information shared during the engagement and does not detail project specifics. A partnership agreement outlines the general terms of the partnership and cooperation between two entities, which again does not focus on the provision of services for a particular project like a Statement of Work does.