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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. However, the description adds no additional behavioral context such as filtering behavior, pagination, or the nature of 'schedule windows' beyond the minimal purpose, missing an opportunity to add value.

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 a single, well-structured sentence that is front-loaded with the action and subject. It conveys the core purpose without any superfluous words, earning top marks for conciseness.

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?

Given the presence of a rich input schema (7 optional filter parameters), an output schema, and clear annotations, the description's job is primarily to state the purpose, which it does. It lacks usage guidance, but that is scored separately; for a list operation with strong structured metadata, the description is largely complete.

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?

The input schema has 100% description coverage for all 7 parameters, each with clear descriptions (e.g., 'Staff member ID', 'YYYY-MM-DD'). The description does not add any parameter semantics beyond what the schema already provides, so the baseline of 3 is appropriate.

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 uses a specific verb ('List') and a specific resource ('schedule windows for booking services'), clearly indicating the tool's function. Although it doesn't explicitly differentiate from sibling tools like get_available_slots, the term 'schedule windows' is distinct enough to convey the purpose.

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 provides no guidance on when to use this tool versus alternatives such as get_available_slots or list_bookings. There are no usage scenarios, exclusions, or hints about which tool fits which situation.

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