list_datacenters

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations exist, so the description needs to carry the behavioral load. The 'list' verb implies a read-only operation, and the dependency context adds practical value, but the description does not mention permissions, pagination, or other behavioral caveats. It is adequate but not rich.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences: the first front-loads the core action, and the second adds the key cross-tool context. There is no filler or redundant restating of schema details.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

This is a one-parameter, read-only list operation with an output schema available. The description names the vCenter scope, explains how the input is obtained, and clarifies how the output is used downstream. Nothing critical is missing for calling it correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the only parameter, vcenter_id, is already clearly documented in the schema with 'obtain from list_virtual_centers.' The tool description adds no extra parameter details, so the baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific action and resource: 'List datacenters in a vCenter Server.' It also distinguishes itself from siblings by explaining that the returned datacenter ID is required by list_vm_folders, list_hosts_or_clusters, and create_desktop_pool/create_rdsh_farm, making its role clear relative to other list tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly tells the agent when this tool is useful: before calling tools that require a datacenter ID. It does not provide explicit when-not/alternative guidance, but the dependency framing is enough to route correct usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.