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

With no annotations, the description carries the full behavioral burden. It usefully discloses that reviews are signed claims by pseudonymous keys and are not verified by KlickyMart, but it omits read-only status, return format, pagination, and ordering behavior.

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, front-loaded sentence with no wasted text. However, the cryptic 'Kind 422' phrasing reduces clarity despite the brevity.

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 retrieval tool with no annotations, no output schema, and an undocumented parameter, the description is too sparse. It should explain what the domain parameter expects and what kind of review data is returned.

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% for the single 'domain' parameter. The description says reviews are 'of a merchant,' which loosely implies the parameter identifies a merchant, but it does not explain that the value is a domain name or give any format guidance.

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 identifies the resource as merchant reviews and adds provenance detail, but it lacks an explicit verb and uses the cryptic phrase 'Kind 422,' which an agent may not understand. It distinguishes itself from submit_review only implicitly by the name 'get_reviews'.

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?

There is no guidance on when to use this tool versus alternatives such as submit_review or search_merchants. The only hint is that it operates on a merchant, but no context, prerequisites, or exclusions are provided.

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