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

Annotations already declare readOnlyHint=true and idempotentHint=true, lowering the burden on the description. The description adds useful pricing semantics (price.per=person and total = price times partySize), which is context beyond annotations. However, it does not clarify pagination behavior or that the response is a list with a cursor, and the 'send partySize' wording could be mistaken as a parameter of this endpoint.

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?

The description is short and front-loads the core meaning: bookable services with duration and price. The second sentence adds a specific pricing nuance, which is useful but not essential for invoking a list endpoint, so it slightly distracts. Overall, there is no filler.

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?

Without an output schema, the description partially explains the returned data (duration, price) and price semantics, but it does not describe the pagination shape or how cursor works. For a simple read-only list endpoint, this is adequate but has clear 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 0%, so the description must compensate for the undocumented parameters. It does not explain limit or cursor at all, and the only parameter-like detail mentioned, partySize, is not part of this tool's input schema. Thus the description adds no useful meaning for the actual parameters an agent must use.

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 identifies the resource as 'bookable services' and notes their key attributes (duration, price), so an agent can infer this is a service catalog listing. It does not explicitly state the 'list' action, but the tool name and title make that reasonably clear. It does not differentiate from siblings like list_products or check_availability.

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?

There is no guidance about when to use this tool instead of alternatives such as check_availability or list_products. The price-per-person note hints at downstream booking behavior but provides no exclusion criteria or context for selecting this endpoint.

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