'dnsenum' is a multifunctional tool designed for enumerating DNS information. Despite its name, 'dnsenum' does much more than just DNS enumeration; it can perform various tasks including whois lookups, host records enumeration, and finding potential subdomains among other features. Stating that it only performs a whois lookup and not subdomain enumeration is incorrect, hence the answer is false. The tool is known for its ability to reveal a wealth of information from a domain's DNS records.