carmax_vehicle

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

With no annotations provided, the description carries full disclosure burden. It clearly states this is credential-free public data, names the primary source (CarMax mobile-app API), and explains the website fallback for fields not exposed by the API—useful behavioral context beyond the tool name.

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?

The description is concise yet information-dense: a one-line purpose, a structured list of returned data categories, and a source/credential note. Every sentence adds value and the main verb and resource are front-loaded.

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?

Despite lacking an output schema, the description inventories the principal return contents (specs, equipment, warranty, history, guarantee terms) and notes credential-free access. This is sufficient context for an agent to select and invoke the tool for a vehicle-detail lookup.

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 baseline is 3. The description does not add parameter-level meaning beyond the schema; stock_number and store_id are already well documented in the input schema.

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?

Description opens with 'Get CarMax vehicle listing detail,' a specific verb+resource pair that clearly identifies the operation. It further distinguishes itself from sibling search/recommendation tools by enumerating the comprehensive detail fields returned.

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 intended use is implied by the name and description: retrieve full listing detail for a specific CarMax vehicle. However, it does not explicitly state when to choose this over sibling tools like carmax_search or carmax_vehicle_recommendations, nor does it mention exclusions.

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