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

Annotations cover the safety profile (readOnlyHint=true, openWorldHint=true). The description goes further by scoping what the payload contains per facility type (pharmacy services/nearby pharmacies, urgent care amenity answers, group practice providers/languages/FAQs), which aids selection. It does not mention auth requirements or rate limits, but adds real 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?

Front-loaded with the verb and resource, then the return contents, then the prerequisite. The long enumeration of return fields is dense but each item helps an agent judge relevance; only mild redundancy against the output schema.

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?

With an output schema and annotations present, the description only needs to cover selection and prerequisite, which it does. The main residual gap is URL format guidance, minor given the upstream-search pointer.

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?

There is one parameter ('url') with 0% schema description coverage, so the description must carry the meaning. 'By URL' plus the pointer to healthgrades_facilities_search implies the URL originates from that tool, but no format (full URL vs. path) or example is given, leaving a gap the schema cannot fill.

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 ('Get'), a precise resource (Healthgrades pharmacy/urgent care/group practice profile), and the access key (by URL). It also enumerates the fields returned, letting an agent distinguish it from healthgrades_hospital and healthgrades_physician without opening a 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 routes the agent: 'Use after healthgrades_facilities_search with type pharmacy, urgent_care, or group_practice.' This names the upstream tool and the exact filter values, so the agent knows when this tool applies versus the search tool.

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