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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states that the subject is comments on a live listing, and does not disclose ordering, pagination, handling of non-live listings, error behavior, or whether the operation is read-only.

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 very concise and front-loads the core subject without filler. It is slightly under-specified as a fragment rather than a complete instruction, but it is not bloated or poorly structured.

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 simple one-parameter fetch, the phrase 'comments' and the schema-provided id are minimally sufficient for an agent to make a plausible call. However, with no output schema and no annotations, the description omits return-format details and behavioral edge cases, leaving clear gaps.

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 input schema fully describes the single required 'id' parameter as the ID of the listing, so the description does not need to repeat it. The phrase 'live listing' adds a slight contextual constraint but does not explain how that affects the accepted id values.

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 names the resource ('comments on a live listing') but is a noun phrase rather than an explicit action, so it does not clearly say 'retrieve comments for a listing'. It is understandable from the tool name, but the description itself is vague about the operation and does not differentiate it from sibling tools like get_listing or list_listings.

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 about when to use this tool versus alternatives, no prerequisites, and no mention of what makes a listing 'live'. An agent has to infer the intended use almost entirely from the tool name and the single id parameter.

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