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

Annotations already declare readOnlyHint and openWorldHint, so safety is covered. The description adds ordering semantics ('most recently modified first'), the returned fields, and the presence of paging totals — meaningful behavioral context beyond the 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?

A single tight sentence with the core operation and ordering front-loaded, followed by the output summary and one usage hint. No padding; every clause carries information.

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?

An output schema exists, so return-format detail is partly redundant, but the description still confirms URLs/slugs/dates and paging totals. For a simple listing tool with fully-described params, nothing essential is missing.

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 coverage is 100%, so the baseline is 3, but the description adds real value on top: it documents the special topic=drugs value for drug articles, which the schema's generic 'topic slug' description does not convey.

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 verb (List) and resource (a Health A-Z topic's articles) with clear scope: one topic, keyed by slug, most-recently-modified first. This distinguishes it from the singular healthgrades_health_article sibling, though it doesn't name that sibling explicitly.

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?

Adds one concrete routing hint ('Use topic=drugs for drug articles'), which is genuinely useful, but gives no guidance on when to prefer this list tool over healthgrades_health_article or how to obtain the required topic slug beyond the schema pointer.

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