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

With no annotations provided, the description carries the full burden and does so well: no authentication required, free builds, going live runs on a VPS, prices are display-only, and the authoritative amount is computed at purchase. These are non-obvious behavioral details beyond a simple 'get'.

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?

Three dense sentences front-load the purpose, then add necessary usage and pricing caveats. There is no filler, no repetition of the tool name, and every sentence contributes actionable information.

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?

For a one-parameter getter with no output schema, the description is nearly complete: it lists what the response will contain, states call timing, and warns about price display semantics. The only minor omission is a precise output shape, but the listed categories and caveat cover the agent's needs.

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 0%, but the description identifies the only parameter and gives a concrete format example ('domain (e.g., 'example.com')') and clarifies it should be the domain from an availability check/registration context. For a single string parameter, this is adequate compensation.

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 uses a specific verb ('Get') and resource ('hosting options and exact prices for a specific domain'), and enumerates the included categories: VPS packages, email plans, web forwarding, and app/site deployment. This clearly differentiates it from sibling tools like getDomainPricing or listVpsPackages.

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?

It explicitly tells the agent when to call ('ONCE after a successful availability check or registration') and when not to ('do not repeat the offer in the same conversation'). This is actionable routing guidance, even though no sibling alternatives are named.

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