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 bar is lower. The description still adds real context beyond them: the dependency on verify_booking's token and the authorization scope limiting results to the requesting homeowner, plus the state model of the returned times.

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?

One densely packed sentence with zero filler, front-loaded on the token's origin before describing the return. The phrase 'the homeowner's three times' is momentarily opaque until the following clause clarifies it, which keeps it just short of ideal.

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 carries the return-value burden and does so adequately (time states, company identity, profile URL), and it names the upstream token source. It omits error/expiry behavior for an invalid token and says nothing about ordering of the three times, which is the main 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?

There is a single parameter with 100% schema description coverage; the schema already states that status_token is what verify_booking returned. The description echoes that provenance rather than adding format, length, or validity-window detail, so the baseline 3 for a fully documented parameter is correct.

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 (return a booking's status) and enumerates the return content: the homeowner's three candidate times with their state (open/confirmed/cancelled), plus the company and profile URL for a confirmed one. An agent can distinguish this from get_available_windows or find_contractors without opening any schema.

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?

Gives a clear precondition ('With the status_token from verify_booking') and an explicit eligibility boundary ('Only for the homeowner whose request it is'). It does not name an alternative tool or a when-not-to-use case, so it falls short of a full 5.

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