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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, which covers the safety profile. The description adds minimal context by implying it returns only 'supported' locations, which suggests a curated list, but no additional behavioral details (e.g., filtering, pagination) are disclosed. With annotations covering safety, a 3 is appropriate as the description adds a small amount of value.

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 a single, concise sentence with no wasted words. It is front-loaded with the core action and resource. However, it is so brief that it under-specifies key aspects, but conciseness itself is not the issue; the sentence is appropriately compact for what it conveys.

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?

The tool has four optional parameters, no required ones, and no output schema. The description does not explain the parameters, return format, or any usage details. An agent calling this tool would not know how to filter results or interpret the response. Given the low schema coverage, the description fails to provide essential context for correct invocation.

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%, meaning no parameter explanations are provided in the schema. The description does not compensate at all; it never mentions the parameters (s, state, country, platform). An agent has no idea what 's' or 'state' means or how to use them. The only parameter with a clear meaning is 'platform' due to its enum, but the description adds nothing to explain the others.

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 states a clear verb ('retrieve') and resource ('supported auction facilities and locations'), which distinguishes it from sibling tools focused on vehicles (e.g., get_vehicle, search_auction_vehicles). It is specific about the resource type, though it does not explicitly differentiate itself from siblings by name.

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 is given on when to use this tool versus alternatives. The description only states what it does, leaving the agent to infer that it is for listing locations, but no explicit when/when-not or alternative references are provided. Sibling tools are mostly vehicle-related, so the intended context is implied but not stated.

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