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 without the description's help. The description does add useful behavioral content by naming the returned fields (pricing method, base price, duration, option sections, recurring frequencies), which matters because there is no output schema — but it omits pagination behavior despite cursor/limit parameters existing.

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 compact sentences with the resource and return fields front-loaded; nothing is padded. The trailing 'GET /v1/services' is mildly redundant transport detail but harmless.

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, the field enumeration is the right kind of compensation and covers the return shape adequately. What is missing for a seven-parameter, paginated list tool is any note about pagination behavior or how it relates to zenbooker_get_service, leaving the agent to reconstruct that from the schema.

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 all seven parameters including cursor, limit, is_visible, category_id and the created_after/before bounds are fully documented in the schema itself. The description adds no parameter-level meaning beyond that, 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?

Specific verb ('List') plus resource ('services a business offers') and an enumeration of the fields returned, so the agent knows exactly what this retrieves. It does not, however, distinguish itself from the sibling zenbooker_get_service, leaving the single-vs-collection split to the agent to infer from the name alone.

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 statement of when to use this tool versus zenbooker_get_service, nor any guidance on the filter parameters available (is_visible, category_id, date ranges) that would tell an agent when this list call is the right choice. Usage is only implied by the tool name.

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