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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the useful fact that the response payload contains label, type, fee, deposit and description, but says nothing about pagination behavior, ordering, or whether results are scoped to the organization — with the field enumeration that lands at an adequate 3.

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?

One compact sentence plus an endpoint fragment, with the substantive definition front-loaded and no filler. Every clause carries information: the resource, its three kinds, and the five returned attributes.

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 simple two-parameter read with full schema coverage and safe annotations, the description supplies what structured data does not: the domain meaning of 'services' and their returned fields. Only minor gaps remain around ordering and whether the list is org-scoped.

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%: limit and offset are already documented, including the useful 'pass the previous reply's next_offset' hint. The description adds no parameter meaning of its own, 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 and resource ('List services') and goes further by defining what a service is in this domain: extras, fees and form fields guests add to a booking. The enumerated returned fields (label, type, fee, deposit, description) make it distinguishable from list_products or list_coupons without opening the schema. It stops short of naming a sibling, so 4 rather than 5.

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 on when to call this versus the many other list_* siblings, nor on prerequisites such as whether services must be fetched before building a booking. The only usage-shaped element is the endpoint string, which is not decision guidance.

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