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

Annotations already cover safety (readOnlyHint=true) and scope (openWorldHint=true), so the bar is lower. The description adds real value beyond them: what the offer set contains (all-in AED price, board type, refundability, exact free-cancellation deadlines) and that booking_url is a human-facing handoff to fostay.com rather than an API action. It does not discuss rate volatility, caching, or error/empty-result 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?

Two tight sentences with no filler; the returned-offer content is front-loaded before the booking_url handoff detail. Every clause carries 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?

With no output schema, the description must convey what comes back, and it does list the key return fields plus the booking_url purpose. It leaves minor gaps — number/ordering of offers, currency handling, and failure modes — but is sufficient for an agent to call and interpret the tool.

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% and the schema itself carries strong parameter guidance (child ages, date formats, hotel_id source), so the baseline of 3 applies. The description only echoes currency (AED) and board/refundability concepts without adding syntax or semantics beyond the schema.

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 gives a specific resource (live bookable room offers) scoped to one hotel and stay dates, and enumerates the returned attributes (all-in price, board, refundability, cancellation deadlines). It implicitly separates itself from search_stays by requiring a single hotel_id, but never names or contrasts a sibling explicitly.

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: an agent can infer this is the pricing/availability step after obtaining a hotel_id from search_stays, and the schema notes the id source. There is no explicit when-to-use, when-not-to-use, or mention of the alternative tools (prepare_booking, when_to_go, demand_calendar).

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