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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that reviews are "normalized" and that text filtering is optional, but does not describe pagination, ordering, or freshness beyond what the schema fields imply, so the added behavioral depth is modest.

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?

Two tightly written sentences, front-loaded with the core capability before the routing guidance. Every clause carries information; nothing is redundant or 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?

With an output schema present and full schema coverage, return values and parameter formats need not be repeated. The description covers scope and sibling routing well; it is only slightly short on pagination behavior, though the page/limit schema fields largely carry that.

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 schema already documents all seven parameters (page, limit, hotel_id, hotel_score, search_text, destination_id, hotel_country_code). The description's mention of optional text filtering maps to search_text but adds no syntax or format detail beyond the schema, so 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 ("Fetch normalized guest reviews"), a precise resource (Booking.com hotel reviews), and scope ("one Booking.com hotel"), plus the optional text filter. An agent can tell it apart from booking_hotel_detail, booking_attractions_reviews, and expedia_properties_reviews without opening any 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?

Explicitly routes the agent: booking_hotel_detail for property/room details, booking_attractions_reviews and expedia_properties_reviews for other travel sources, and hotels_reviews for the separate Hotels.com catalog. When-to-use and when-not-to-use are both spelled out with named alternatives.

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