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 covered. The description still adds real value by disclosing the shape of the returned data (drink value caps, daily limits, gratuity), which matters because no output schema exists.

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?

One sentence, no filler, with the resource and the returned-content list front-loaded. Every clause earns its place by telling the agent what it gets back.

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 no-required-param read-only lookup with no output schema, the description covers both scope and the fields returned, and annotations handle the safety semantics. The only gap is the absence of any routing guidance among the twelve sibling lookup tools.

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 single parameter has 100% schema description coverage ('Cruise line name; omit for all lines'), so the schema fully carries parameter meaning. The description's 'by cruise line' phrasing is consistent with it but adds nothing beyond the schema; a baseline 3 is appropriate.

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?

Names a specific resource (beverage/drink packages) and enumerates the returned fields (package names, max drink value, daily limits, gratuity), which clearly separates it from siblings like getDressCode or getCabinDetail. It lacks an explicit verb, 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?

There is no explicit when-to-use or when-not-to-use statement, and no alternative sibling is named. Usage is only implied by the 'by cruise line' framing plus the schema's 'omit for all lines' note, which is enough to infer a filtered lookup but not documented guidance.

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