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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds genuine context beyond that: results are paginated, span all channels, and include guest, dates, channel, price and payment status, plus the underlying endpoint. It could have noted pagination limits or rate behavior but adds real value.

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?

Three compact sentences, front-loaded with the core action and scope, then filters, then the endpoint. Every clause carries information and nothing is redundant.

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?

For a 17-parameter tool with no output schema, the description usefully names the returned fields and notes pagination, which compensates for the missing output schema. It does not explain pagination limits or how the various date filters combine, leaving minor gaps.

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 every parameter is already documented with format and bounds. The description only groups filters into categories (stay range, arrival, departure, creation/modification, property) without adding syntax or semantics beyond the schema, so baseline 3 is appropriate.

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 (List) and resource (reservations) with scope ('across all channels') and enumerates the returned fields, so an agent distinguishes it from smoobu_get_reservation (singular) by name. It stops short of explicitly naming the sibling it is not, so it is clear but not sibling-differentiated in text.

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 filter list implies when to use it (date/property-scoped listing), and the 'List' vs 'get_reservation' naming hints at the alternative, but there is no explicit when-to-use/when-not statement or named alternative. Usage is inferable rather than stated.

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