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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. The description adds useful output-fidelity behavior (proper nouns must not be translated, prices exact and non-convertible) but says nothing about auth, rate limits, or failure behavior.

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?

Front-loaded with the core action and its key argument, then a compact parenthetical of returned fields, then the two output-fidelity rules. The parenthetical enumeration is dense but each item earns its place by telling the agent what to expect.

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 enumerating the returned details and warning about proper-noun and price handling. For a simple single-id read tool, nothing an agent needs to call it correctly is missing.

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%, so all three parameters (id, date with relative-term support, locale for booking-link localization) are already fully documented in the schema. The description only restates 'by id' and adds no param syntax or defaults beyond what the schema provides; 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?

States a specific verb and resource with scope — 'Get full details for one DayPass experience by id' — and enumerates the returned content (hours, amenities, photos, pricing, rating, booking link). This clearly separates it from list/search siblings like search_experiences and from render_experience.

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?

Usage is only implied by 'by id' — the agent can infer it needs a known experience id, but the description never states when to prefer this over check_availability, get_quote, get_reviews, or render_experience. The translation/price rules are output-fidelity instructions rather than when-to-use guidance.

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