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, network access, failure modes, or whether parameters are ignored. It only mentions titles are discarded, leaving most behavioral aspects unspecified.

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 extremely concise and front-loaded with the main action. It avoids unnecessary detail while still clarifying the output nature with 'Titles discarded.'

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 accepts nine optional parameters with confusing, unrelated descriptions, but nothing explains their relevance or the return format. The absence of an output schema and any usage context leaves the tool feeling incomplete for an agent.

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 all parameters have descriptions, they are generic and unrelated to the stated purpose of counting Hacker News stories. Terms like 'discarded after the shape check' explain disposal but not why the parameter exists or how it affects the count, so the descriptions add little meaningful semantic value.

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 tool's function: count current Hacker News front-page stories. The phrase 'Titles discarded' reinforces that only a count is produced, distinguishing it from content-fetching tools like web-fetch or search-query-len.

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 guidance is given about when to use this tool versus alternatives. It does not mention scenarios, prerequisites, or why an agent would choose it over sibling tools such as web-fetch or fetch-status.

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