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

No annotations are provided and the description only says 'Titles discarded.' It does not disclose whether live fetching occurs, side effects, rate limits, authentication needs, or failure modes. The unrelated schema parameters further obscure actual behavior.

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 only two short sentences. The first sentence states the action and resource, and the second clarifies that titles are not returned. It is concise with minimal wasted 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?

Given the confusing, unrelated schema, the description is severely incomplete. It lacks output format, parameter explanations, error behavior, and any clarification of how the caller should supply input. An agent cannot reliably invoke this tool based on the description alone.

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?

All nine parameters have descriptions, but none relate to Hacker News or counting stories. Parameters like url, city, json, and path appear copied from other tool contexts and provide no meaningful semantics for this tool.

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 first sentence clearly states the action (count) and resource (current Hacker News front-page stories). The phrase 'Titles discarded' adds slight ambiguity but does not obscure the core 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 guidance is given on when to use this tool versus siblings like web-fetch or status-catalog. There is no mention of use cases, alternatives, or conditions that would favor this tool.

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