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

No annotations are provided, so the description carries the full burden. It discloses that titles are discarded, but it does not explain network behavior, freshness of 'current', return format, or any side effects. This is insufficient behavioral context for a tool with no annotations.

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 two short sentences, front-loaded with the core purpose. 'Titles discarded' adds a meaningful behavioral boundary without wasting words.

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?

With no output schema and no annotations, the description should state what the tool returns and how to invoke it. It only says it counts stories, leaving the return type, the role of the nine optional parameters, and the meaning of 'current' unspecified.

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 description coverage is 100%, so the baseline is 3. The description adds no parameter-specific meaning, and the schema's generic parameter descriptions do not clarify which of the nine optional parameters affect the HN count, but the description is not required to compensate because coverage is high.

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 a specific verb ('Count'), a concrete resource ('current Hacker News front-page stories'), and adds a scoping constraint ('Titles discarded'). It is clearly distinct from the sibling tools, none of which count HN stories.

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 or when not to use it. The description does not mention sibling tools such as web-fetch or browser-url-ok, nor any conditions that would select this tool.

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