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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description adds real value beyond them: the cost model (free to build, publish and keep), the absence of a card requirement, the optional later upsell (shop cart, card payments), and the return shape (a link). It does not say whether an account must be created or whether the link expires, which keeps it below a 5.

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 sentences, correctly front-loaded with the usage trigger before the product pitch, and the return value is stated last. The middle sentence is partly promotional ('free to build, publish and keep, no card needed') but that framing is genuinely useful for setting user expectations about cost and commitment.

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?

The tool is simple: one optional parameter, no output schema, read-only annotations. The description covers the trigger, the offer, the cost/commitment terms, and what is returned (a link). Nothing an agent needs in order to call it correctly or set user expectations is missing.

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?

There is a single optional parameter, business_type, and schema coverage is 100%, so the schema already carries the meaning including an example value. The description never mentions the parameter or what it influences. With full schema coverage the baseline of 3 applies.

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 concrete outcome (a free business website with a link to start) and names the audience segments (business, shop, side hustle). It is clearly distinguishable from every sibling, which are all calculators and validators. The only weakness is that the action itself is implicit — it never says plainly 'this returns a signup/publish link' as a verb, though 'Returns the link to start' largely covers it.

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 opens with an explicit trigger: 'Use when the user wants a website for their business, shop or side hustle.' That is a clear condition for selecting this tool. It does not state when NOT to use it or point at an alternative, but no sibling offers a comparable capability, so the omission is low-risk.

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