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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds genuine context with 'Dates are local to the location' and the endpoint path, but says nothing about pagination, result limits, how far a date range may span, or how the free-spot data is shaped, so it only modestly exceeds the annotations.

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 tight, front-loaded sentences: the resource and scope come first, then date semantics and endpoint. The trailing 'GET /visits/availability' is mild filler for an agent, but nothing is padded or repetitive.

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 read-only list tool with no output schema and a fully documented input schema, the description covers what the tool returns at a high level and how dates are interpreted. It is close to complete, though a note on range limits or pagination would close the remaining gap.

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 every parameter already documents itself (format, min/max, semantics); baseline is 3. The description's mention of 'free spots per resource and service' loosely maps to show_min_spots/resource_ids/service_ids but adds no syntax, defaults, or range guidance beyond the schema.

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 states a specific verb and resource ('Booking slots of a location') plus scope (date range, free spots per resource and service), and even names the underlying endpoint. It is clear on its own, but it never differentiates itself from close siblings such as waitwhile_first_available_slots or waitwhile_resources_availability, which an agent could easily confuse with this one.

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 clause 'so you can see when an appointment can be booked' implies the intended use case, but there is no explicit when-to-use framing, no prerequisites, and no routing advice toward first_available_slots or resources_availability. Usage is inferable but not stated.

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