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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds that the tool returns id and name and identifies the backing endpoint, but it does not discuss return shape beyond those two fields, pagination, or any authentication requirements. With annotations doing most of the behavioral work, this is adequate but not rich.

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 two short sentences with no wasted words. The key information is front-loaded: what the tool lists, what it returns, and what the returned IDs are used for.

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 zero-parameter read-only list tool with annotations covering safety, the description gives enough context to call it correctly: it names the resource, the return fields, and the intended use of the IDs. It does not explain the exact response structure or pagination, but those gaps are minor for this simple endpoint.

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 no parameter semantics to document and the baseline score of 4 applies. The description does not need to compensate for any schema gaps.

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 clearly states a specific verb and resource: list warehouses, clarified as stock locations, and notes the returned fields id and name. It is clear enough for an agent to understand the operation, but it does not explicitly distinguish this tool from the sibling list_stores, which could cause confusion.

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 sentence 'Use the ids for stock levels' gives clear context for why an agent would call this tool, namely to obtain warehouse IDs for subsequent stock-level queries. It lacks explicit when-not conditions or named alternatives such as list_stores, but the usage context is still evident.

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