Which AWS service or tool will meet these requirements?

Explanations:

AWS Trusted Advisor provides recommendations to optimize AWS resources but does not assess on-premises environments or project cloud costs.

Amazon Inspector is a security assessment service that checks for vulnerabilities in applications on AWS; it does not offer cost assessment or migration analysis.

AWS Control Tower helps set up and govern a secure AWS multi-account environment but does not assess on-premises environments or calculate projected AWS costs.

Migration Evaluator (formerly TSO Logic) provides insights into the cost of migrating from on-premises to AWS, offering customized assessments and projected AWS running costs.