VPS_purchaseNewVirtualMachineV1

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

Since no annotations are provided, the description must cover behavioral aspects. It discloses the fallback manual completion and default payment behavior, but does not reveal whether the operation is synchronous, if there are side effects, or what a successful response looks like. Partial transparency.

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?

Description is three short paragraphs, each with a distinct point. It is front-loaded with the main action. Some minor repetition ('Use this endpoint to create new VPS instances' is redundant with the first sentence), but overall efficient.

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?

Given the complexity and the presence of many sibling VPS tools, the description covers the basic flow (purchase and setup) but omits important context: that item_id likely comes from a catalog, what the setup parameter should be, and potential prerequisites. It could be more 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?

Schema coverage is 100%, so the schema already documents all parameters. The description adds little extra: it reiterates the payment method default, but does not clarify what 'setup' parameter expects or how 'item_id' is obtained. 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?

Description clearly states 'Purchase and setup a new virtual machine' and ends with 'Use this endpoint to create new VPS instances.' It uses a specific verb and resource, and suggests creation of new instances. However, it does not distinguish itself from the sibling 'VPS_setupPurchasedVirtualMachineV1' which might focus on setup only.

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 includes practical notes about manual fallback and default payment, but it does not provide explicit guidance on when to use this tool versus alternatives (e.g., when item_id is known, or distinct from VPS_setupPurchasedVirtualMachineV1). No usage conditions or exclusions are mentioned.

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