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

Annotations only declare readOnlyHint=true; the description adds the ordering guarantee (newest first) and the pagination mechanic (links.next / before), which an agent needs to traverse results. With no output schema, describing the returned fields is genuinely additive, though auth/rate-limit behavior is 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 sentences, front-loaded with the resource identity and payload, followed by the paging instruction. No filler and no redundancy.

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 fully documented params and no output schema, the description covers the important extras (ordering, paging, payload fields). Only minor gaps remain, such as default page size behavior and the shape of links.next.

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% and each of the four params is already documented, including the 'use with links.next' note on before. The description echoes that paging guidance without adding new syntax or format detail, so it sits at the high-coverage baseline.

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 precise resource (individual test runs for one uptime check) and enumerates the payload fields (when, location, status code, response time ms), which separates it from config-oriented siblings like statuscake_get_uptime_check and aggregate siblings like statuscake_get_uptime_periods.

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?

It tells the agent how to page ('follow links.next (or pass before) to page back') but never states when to choose this tool over alternatives such as statuscake_get_uptime_periods. Usage is implied rather than contrasted.

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