There are some VMware tools that can help by providing reports on your current environment. Most of these tools come with a 60-day evaluation period, which is enough time to get the information needed, and they are listed as follows:

• VMware vSphere Health Check: This is provided by VMware or partner professional services and based on a virtual appliance (or also a standalone package) that can connect to your VMware infrastructure and analyze it, with a great report generator. At this point in time, it's only available for VMware employees or selected partners. For more information refer to https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/products/vsphere/consserv-vmware-vsphere-health-check-datasheet.pdf.
• vSphere Optimization Assessment (VOA): A powerful assessment tool to help optimize your vSphere environment with three analysis reports powered by vRealize Operations. For more information refer to https://www.vmware.com/assessment/voa.
• VMware vRealize Operations: The main purpose of this tool is monitoring, in a proactive way, a virtual (and in some parts also physical) infrastructure. But it can also provide some useful insight for capacity and resource planning, as also for resource optimization and resource reclaim. For more information refer to https://www.vmware.com/products/vrealize-operations.html.
• vCloud Suite Assessment: This would benefit organizations whose IT environments are predominantly or entirely virtualized and who are considering a move to the full VMware software-defined data center suite. For more information see https://vip.vmware.com/.
• Virtual Network Assessment (VNA): This utilizes a VMware tool called vRealize Network Insight (vRNI) to provide a holistic view of the traffic in the data center across the virtual and physical domains, and understand how much traffic exists between VMs, applications, VLANs, and VXLANs. Identify threat planes across physical networks, virtual domains, cloud, and mobile environments.
• vSAN Assessment: Collect data about your existing vSphere storage environment in just one week and get the technical and business recommendations you need for a vSAN design.
• Virtual Desktop Infrastructure (VDI) Assessment: This is a specific assessment for a VDI environment that identifies the best candidates both for the users and the desktops; if they can be moved into a virtual desktop environment, and the order in which those groups and desktops should be virtualized to a successful VDI project.

Then, there are tools from other vendors, or also community scripts or your personal set of scripts. Note that community tools are not officially supported by VMware as they can also vary or change (there are a lot of scripts that are quite old). But scripting could be the best way to check some specific details, for example, to check whether the number of paths of each shared storage device is what you expect.

The following is a partial list of some of these tools:

• RVTools: Probably the most powerful and simple (you have just to connect to your vCenter or hosts) tools to inventory your environment. It also provides some health check capabilities; for more information, see http://www.robware.net/rvtools/.
• VMware {code} vCheck vSphere: A community script useful both for inventory and health check; for more information, see https://code.vmware.com/samples/823/-vcheck-vsphere.
• Some cloud-based monitoring tools with assessment and/or health check functions are as follows:
  • Runecast: https://www.runecast.biz/
  • Opvizor: http://www.opvizor.com/
  • CloudPhysics: https://www.cloudphysics.com/

Most of them can also provide verification of how best practices are used and applied. The best way to learn more is just to try them, or ask for a demo.

• Veeam ONE: This provides advanced monitoring, reporting, and capacity planning capabilities designed to help you protect your virtual and backup environments. It also provides some useful report for the assessment of a virtual environment; for more details, see https://www.veeam.com/one-vmware-hyper-v-monitoring-reporting.html.
• Turbonomic Virtual Monitor: This is a free product that provides virtualization monitoring and reporting in an unlimited fashion across vSphere, Hyper-V, XenServer, and Red Hat Virtualization, not only for network monitoring, but also for providing insight into risk and efficiency information and potential improvements across the environment. For more information, see https://turbonomic.com/downloads/virtual-health-monitor/.

The most interesting and effective tools are RVTools and some assessment tools from VMware (VMware vSphere Health Check is probably the most interesting but unfortunately it cannot be directly used by customers or end users). Note that there are also situations, such as application dependency mapping, where other tools could be useful; for example, the vRealize Infrastructure Navigator.