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

No annotations are provided, and the description does not disclose side effects, return format, error behavior, or the fact that many input parameters appear to be ignored. The tool's behavior remains opaque.

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 short and front-loaded, consisting of two brief sentences. It loses some value due to the confusing 'Titles discarded' clause, but overall it is not verbose.

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 description is far too minimal given the tool's 9 optional parameters and lack of an output schema. It does not explain parameter roles, return values, or when this tool should be preferred over related siblings.

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?

Although every parameter has a schema description, the descriptions are generic and unrelated to the tool's stated purpose (e.g., 'Git ref name', 'City name for a public weather hint'). They do not clarify how any parameter affects counting HN front-page stories.

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 clearly states the action ('Count'), the resource ('current Hacker News front-page stories'), and is distinct enough from siblings. However, the phrase 'Titles discarded' is ambiguous and could confuse the exact purpose.

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?

No usage guidance is provided. The description does not mention when to use this tool instead of alternatives like web-fetch or fetch-status, nor does it explain the expected input/output behavior.

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