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

Annotations already declare readOnlyHint, openWorldHint, and non-destructive, so the safety profile is covered; the description adds substantial extra behavior beyond that. It discloses that sold-out venues are still returned with available:false, that prices are exact and must not be converted, that names are proper nouns that must not be translated, and that locale only localizes the booking link.

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 search modes and result shape, then appends the important output-handling constraints (don't translate, don't convert prices). Four sentences, each carrying real information, though the return-field enumeration slightly overlaps the output schema.

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?

Complete for an 8-parameter, open-world search tool: required vs optional params are clarified, the country-only pattern is explained alongside the city pattern, and the critical presentation rules (exact prices, non-translatable proper nouns) are stated. An output schema exists, yet the description still flags available:false semantics, which is the one return detail an agent needs to reason about.

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 the baseline is 3; every parameter is already documented (city optionality, relative date terms, sort values, type filter behavior, locale purpose, price/rating filters). The description reinforces city-vs-country semantics and price/currency handling but adds no parameter syntax beyond what the schema already provides.

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+resource (search DayPass venues) and defines the two search modes: by city, or by country/island name for smaller markets, with a concrete example. It also names the sibling to use for deeper detail (get_experience), so an agent can distinguish it from get_experience without inspecting either schema.

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?

Gives clear when-to-use guidance: omit city for a whole-country/island search, and call get_experience when child/kid pricing or full details are needed. It does not mention check_availability or list_destinations as adjacent alternatives, but the primary routing decision is well covered.

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