In this case, the risk description for "Incomplete requirements specification" has been identified as a high likelihood and high impact risk. To mitigate this, the most appropriate strategy would be to conduct thorough requirements analysis and validation. This ensures that the integration of the new tool with the customer relationship management system aligns with the business objectives and avoids misunderstandings or gaps in the product requirements, which could cause delays or rework later in the project. This step addresses the core challenge of ensuring the product meets the business needs and integrates smoothly with existing systems.