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

Annotations are all false, providing minimal safety info. The description adds valuable behavioral context: it is free ('no wallet'), non-destructive (does not mention side effects), and each call increments an anonymous aggregate count. It also explains the seed's effect on repeatability. This goes beyond annotations, offering clear behavioral expectations.

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 succinct, with each sentence serving a purpose: what it does, cost, side effect, seed behavior. It is front-loaded with the core action, making it easy for an agent to skim. No fluff or redundant information.

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?

Given the tool's simplicity (3 params, no output schema), the description covers the essentials: action, cost, side effects, repeatability. It could mention what a 'souvenir' is or what the output looks like, but with no output schema, the agent can still infer a response. It adequately supports 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?

With 0% schema description coverage and no parameter descriptions, the description must compensate. It does: 'An optional seed makes the souvenir repeatable' directly explains seed's purpose. Although 'amenity' and 'preference' are not explicitly described, the enum for amenity is self-explanatory, and 'preference' likely maps to the experience variant. The description provides enough context to infer parameter usage.

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 the tool's action: 'Enjoy a short fictional experience and receive a souvenir.' It specifies the resource (an amenity) and the outcome (a souvenir). It is distinct from siblings like list_amenities, providing a clear purpose. However, it could be more specific about the nature of the experience and how it differs from other tools.

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 description implies usage for a fun, free interaction without a wallet, and mentions an optional seed for repeatability. It does not explicitly state when to use this tool over siblings, but context signals (sibling names) suggest it complements list_amenities. No explicit exclusions or alternative conditions are given, so it's inferred rather than explicit.

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