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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the description is free to add substance — and it does, explaining that acceptingBookings is false until weekly hours, an active appointment type, and an active door exist, and that problems reports what to fix. That is meaningful behavioral context about the returned state, though it stops short of the full response shape.

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 dense sentences with the resource identified first and the readiness conditions second; every clause carries information and nothing is redundant.

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 description usefully explains the key returned fields (acceptingBookings, problems) and the prerequisites that drive them, plus the URL format. What it omits is any explanation of the locationId input it requires, though for a one-param read tool the omission is minor.

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 0% for the single locationId parameter, and the description never explains the parameter, describing only a /book/{slug} link. It does not compensate for the missing schema descriptions, but with a single obvious required string id the ambiguity is limited.

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 names the concrete resource (the public booking link carriers use at /book/{slug}) and the specific state it reports (whether it can take bookings). That is a specific verb+resource an agent can act on, though it never explicitly contrasts itself with the near sibling get_location_setup.

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?

Usage is implied rather than stated: an agent can infer this is the tool for inspecting booking-page readiness, and the conditions listed clarify when acceptingBookings flips true. However there is no explicit 'use this when / use X instead' guidance or any routing against get_location_setup.

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