When assessing a new test automation tool, what key factors should be considered to ensure a positive cost-benefit ratio?

Assessing a test automation tool for a positive cost-benefit ratio involves considering factors such as the learning curve for the testing team, the tool's compatibility with the application under test, and the maintenance efforts required. A tool with a steep learning curve or high maintenance needs may impact the overall efficiency and cost-effectiveness of the automation process. Evaluating these factors helps in selecting a tool that aligns with the project's requirements and budget.