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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and externality are covered. The description adds that results carry a 'lowest displayed price', a summary, and a price-page slug, which is useful context, but with an output schema present this return detail is less load-bearing and no other behavioral traits (pagination, rate limits) are disclosed.

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, front-loaded sentence that states the action, the input source, and the returned fields with no wasted words. 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?

For a one-parameter read-only list tool with annotations and an output schema, the definition covers action, input origin, and return fields adequately. The only real gap is the lack of differentiation from closely named siblings.

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 0% for the single required 'slug' parameter, so the description must compensate. It does identify the parameter as a condition slug sourced from goodrx_conditions, which adds real meaning, but it provides no format or syntax detail beyond that origin reference.

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 (medications for one condition) and names the source tool (goodrx_conditions) that provides the slug, which is genuinely useful. It does not, however, clarify how it differs from nearby siblings like goodrx_drugs or goodrx_drug_options, so it falls short of full sibling differentiation.

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?

The description implies a prerequisite chain by saying the slug comes from goodrx_conditions, which hints at when to use it. But it gives no explicit when-to-use guidance or exclusions vs alternatives such as goodrx_drugs or goodrx_drug_prices, leaving usage inference to the agent.

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