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

No annotations are provided, so the description carries the transparency burden. It reveals that titles are discarded, but it does not mention live network access, side effects, errors, or that most input parameters are ignored beyond per-parameter schema notes.

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?

Two short sentences, front-loaded with the core purpose. No filler or redundant wording.

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 adequate for a trivial count-only action, but it omits output type, failure behavior, and any context about what 'current' means or how parameters like feed/url relate to the count. With no annotations or output schema, this is under-specified.

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 tool description adds no further relationship between the nine optional parameters and the HN front-page count; several parameter descriptions say they are discarded, but the overview does not clarify which, if any, affect the count.

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?

States a specific action and resource: counts current Hacker News front-page stories. 'Titles discarded' clarifies the result is only a count, not a list of titles.

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?

Does not mention when to prefer this tool over siblings such as web-fetch or fetch-status, nor when not to use it. The purpose implies counts are desired, but no explicit alternative guidance is given.

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