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 only a list of returned fields, which duplicates the output schema, and says nothing about permissions, freshness, or locality of the data beyond what annotations provide.

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 first and then the payload. No filler, though the field enumeration is partly redundant with 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?

For a one-parameter detail lookup with an output schema and safe-read annotations, the description is sufficient: it identifies the resource and its payload. Only the absence of when-to-use routing keeps it from being fully complete.

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% and the single id parameter is fully documented in the schema (including that it is the numeric path segment of /stores/{id}). The description adds no parameter meaning. Baseline 3 applies when the schema does the heavy lifting.

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?

The description names the resource (CarMax store / physical location) and states it returns detail, enumerating the fields (name, address, phones, coordinates, hours, store-type flags). An agent can tell it retrieves a single store's detail. It does not explicitly differentiate itself from the sibling carmax_stores (list) tool, which the naming only implies.

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 guidance on when to use this versus carmax_stores or carmax_search, and no mention that an id from a search/vehicle response is a prerequisite. The schema field hints at the source of the id, but the description itself offers no routing context.

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