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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds that the result set is a fixed set of five apartments with their attributes, which is modest but real context beyond the annotations; it says nothing about ordering or whether links are stable.

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 sentence that front-loads the resource and ends with the returned fields; no filler, no marketing padding beyond the location string that disambiguates which property this is.

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?

There is no output schema, and the description compensates by listing the fields returned (capacity, beds, sea view, terrace, link). Safety is covered by annotations and the parameter by the schema, so the remaining gap is only the missing routing guidance to siblings.

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 'language' enum parameter is fully documented in the schema, including the default. The description does not mention localisation at all, so it adds nothing beyond the schema—baseline 3 applies.

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 concrete resource (the five holiday apartments of Apartments Perlamar, with address and beach location) and enumerates the attributes returned, so an agent knows exactly what data this yields. The verb is only implied by the name/title rather than stated in the description, but the scope is unambiguous.

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 statement of when to call this versus siblings such as get_apartment_details or search_availability. The natural reading (call this first for the catalogue, then drill down) is inferred, not written, and there is nothing about when this tool is the wrong choice.

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