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 genuinely non-structured behavior: ordering by most recently modified first, and that paging totals accompany the results. It stays silent on rate limits or permission needs, but those are minor for a read-only listing.

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 sentences, both earning their place: the first covers purpose, scope, ordering, and return shape; the second handles routing. Scope and ordering are front-loaded with no filler.

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 values need not be explained, and the description still usefully mentions paging totals against the page/page_size params. The one omission is where to obtain a valid topic slug, but the task is otherwise fully 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 schema already documents page, topic, section, and page_size in detail. The description only restates that section is required and topic is optional, adding no format or syntax detail beyond the schema. Baseline 3 applies.

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'), the resource ('GoodRx Health articles'), and the scope ('in a section and optional topic'). It also distinguishes itself from the sibling goodrx_health_article by noting that returned paths feed that tool, so an agent can route without opening either schema.

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?

Explicitly says 'Use paths with goodrx_health_article,' giving clear downstream routing. However, it offers no when-not guidance and never points to goodrx_health_topics as the source for the topic slug, which the schema references only indirectly.

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