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 the underlying REST endpoint and the exact set of fields returned, which is useful, but says nothing about permissions, pagination, or error behavior for a missing reservation id.

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 sentences, zero filler, with the substantive content (what the breakdown contains) front-loaded and the API path relegated to a trailing reference. Every clause earns its place.

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 present, the description does the work of enumerating the returned fields, which is the key missing structured information. It is nearly complete for a simple one-parameter read tool; only the relationship to sibling read tools remains unstated.

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 single required reservation_id parameter is documented in the schema itself. The description adds no syntax, format, or sourcing guidance beyond the schema, so the 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 (list) and resource (financial breakdown / price elements of one reservation) and enumerates the components returned (base price, cleaning fee, add-ons, discounts, coupons, tax, currency). This clearly distinguishes it from smoobu_get_reservation and smoobu_list_reservations.

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 phrase 'of one reservation' implies the tool is scoped to a single booking, which implicitly routes the agent here for pricing detail rather than the general reservation fetch. However, it never names an alternative tool or states when-not to use it, leaving the choice between this and smoobu_get_reservation to inference.

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