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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so safety is covered. The description adds non-annotation behavior: result ordering (newest first), cursor pagination, and the fact that date filtering is on stay dates rather than creation time. It does not say whether all statuses are returned by default, which is the main remaining behavioral gap.

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 with the core scope, ordering, and pagination front-loaded, followed by the one filter caveat that most needs emphasis. No filler or restated title content.

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 and pagination.next_after is referenced, so return-value explanation is not needed. The description covers ordering, pagination, and the date-filter semantics; the notable omission is whether unfiltered calls return all statuses (including cancelled), which matters for a reservation listing 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 83%, so the schema already documents most parameters and the baseline would be 3. The description adds genuine meaning beyond the schema by contrasting the stay-date window against creation-date filtering and tying 'cursor-paginated' to the after/limit pair, though status and apartment_id go unmentioned.

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 (list reservations) with scope ('across the account's apartments') plus ordering ('newest first') and pagination style ('cursor-paginated'). It is clearly distinguishable from get_reservation (singular fetch) and list_reservation_messages, though it does not name any 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?

The description clarifies the semantics of the from/to window ('filter by stay date ... not by when the reservation was created'), which is a real disambiguation for callers. However, it never states when to prefer this tool over get_reservation, get_stats, or how to handle the default no-filter case, so usage guidance is implied rather than explicit.

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