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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint, and the description merely restates 'Read-only'. The one piece of added context is the API-key permission caveat, but it says nothing about what happens when shopId is omitted, how pagination behaves, or the shape of the returned hours.

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 short sentences with the core purpose front-loaded and no filler. It is efficient, though the second and third sentences are thin on substance relative to the space they occupy.

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 zero-required-parameter list tool with no output schema, the description covers what is returned conceptually (opening/closing hours) and the permission model. It falls short on pagination and multi-shop scoping, which an agent needs to call this correctly.

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 coverage is only 33% — shopId is documented, but page and pageSize are bare integers with defaults and limits only. The description does not compensate at all: no mention of paging, defaults, or whether omitting shopId spans multiple shops.

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: reviewing the shop's configured opening and closing hours. It is distinguishable from siblings like shopboss_list_appointments or shopboss_list_bays by resource alone, though it never explicitly contrasts itself with them.

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 description gives no when-to-use guidance, no exclusions, and no mention of alternatives. 'Resource permissions depend on your Shop Boss API key' is a prerequisite note, not guidance on when this tool versus a sibling is appropriate.

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