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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds value by disclosing the payload content ('slugs and whether a medications list exists') and the exhaustive 'every' scope, which tells the agent this is a full enumeration rather than a filtered lookup.

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 names the resource and the return shape with no filler. 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 parameterless read-only directory listing with an output schema and safety annotations already present, the description is nearly sufficient. It could more explicitly state that no input is required and how the slugs feed downstream calls.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. The description does not misrepresent any input surface.

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 and resource ('List every health condition in GoodRx's directory') with the returned shape (slugs plus a medications-list flag). It gestures at the relationship with goodrx_condition_drugs but does not explicitly distinguish itself from the singular goodrx_condition sibling.

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 explicit when-to-use/when-not guidance or named alternative. Usage is only implied by the note that the flag indicates whether a medications list exists for goodrx_condition_drugs, which hints at a browsing-then-drilling flow but leaves selection between goodrx_condition, goodrx_conditions, and goodrx_condition_drugs to inference.

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