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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and open-web behavior are covered. The description adds that a destination and date range are the driving inputs, but says nothing about pagination behavior, rate limits, or result volume for a paginated search tool.

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 tight sentence with the resource front-loaded and no wasted words. It is appropriately sized but slightly under-specifies rather than being padded.

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?

An output schema exists so return values need not be described, but for a 7-parameter tool with 0% schema coverage and no usage guidance, the description leaves too much undocumented (pagination, locale/currency behavior). It is insufficient for the tool's actual complexity.

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 coverage is 0% across 7 parameters, so the description carries the burden. It only implies three of them (destination, start_date, end_date) and says nothing about page, page_size, locale, or currency, which are entirely undocumented anywhere.

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 (Search) and resource (Expedia Things To Do / activities / tours), and clarifies scope with the parenthetical synonym. It reads clearly as the activities vertical distinct from expedia_flights_search and expedia_properties_search, though it never explicitly names a sibling to differentiate itself.

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 when-to-use guidance, no prerequisites, and no mention of alternatives (e.g., agoda_activities_search, booking_attractions_search, or the sibling expedia_* tools). The destination+date-range framing implies context but leaves the agent to infer when this tool is the right choice.

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