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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered; the description adds genuinely new behavior — 15-minute slot granularity, results truncated to the current moment, and the future-date requirement. Timezone handling and failure behavior for past/invalid dates remain unstated.

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 compact sentences with the return shape front-loaded and constraints immediately after. The trailing API route reference (GET /v2/jobs/schedules/...) is mild noise for an agent but still maps the tool to the underlying endpoint.

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 does the work of explaining what comes back (start/end pairs at 15-minute steps), which is what an agent needs. It is nearly complete for a simple read tool; timezone semantics for the returned slots is the main omission.

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 100%, so baseline is 3, but the description contributes extra meaning for `date` beyond the schema's 'YYYY-MM-DD' pattern: the date must be in the future and results are clipped to now. The `type` and `zone` parameters are left to the schema's examples.

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 — available scheduling slots in a zone for a date — plus the granularity (15-minute steps) and the response fields (start and end). No sibling tool covers schedule slots, so an agent can select it unambiguously.

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 only usage guidance is the constraint 'Use a future date' and the note that slots run from the time of the request onward. There is no explicit when-to-use versus when-not framing or reference to any alternative, though the sibling list contains no direct competitor.

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