List VPS Data Centers

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It only states 'Get', which implies read-only access, but it does not explicitly confirm the absence of side effects, describe the response format, or note any operational constraints. For a simple list operation, this is minimal but lacks useful behavioral context.

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 a single, concise sentence that directly states the tool's function with no redundancy or filler. It is appropriately sized and front-loaded, earning the highest rating for conciseness.

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?

While the tool is simple (no parameters, no annotations, no output schema), the description is skeletal. It lacks context such as the purpose of listing data centers (e.g., for VPS provisioning) or differentiation from sibling data center tools. However, it does convey the basic action clearly, making it minimally viable but not fully complete.

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?

The tool has zero parameters, so the input schema is empty. The description does not need to explain parameter semantics, and per the baseline rule for no parameters, a score of 4 is appropriate since there is nothing to compensate for.

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 'Get available VPS data centers' clearly states the action (Get) and the resource (available VPS data centers). The 'VPS' qualifier distinguishes it from sibling tools like hosting_datacenters_list and agency_datacenters, making its purpose unambiguous.

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 provides no guidance on when to use this tool versus alternatives. It does not mention any contextual triggers, prerequisites, or exclusions, leaving the agent without explicit usage direction beyond the resource name itself.

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