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

Annotations only provide destructiveHint=true, so the description usefully adds that the operation requires the read/write API key and that it returns the new page's token and URL. It does not contradict the annotation. It still omits side effects such as whether creating a page affects existing checks or quota, keeping it short of a 5.

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?

Three tight sentences that front-load the action, follow with the return value, auth requirement, and endpoint tag. No filler, though the raw 'POST /api/status_pages' endpoint string adds little for an agent.

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 correctly compensates by naming the returned values (token and URL), and it covers the auth requirement. All five parameters are fully documented in the schema, so the remaining gap is only the absence of when-to-use and side-effect context.

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 the schema already documents all five parameters including the checks ordering and access_key default. The description's 'showing the given checks, in order' merely echoes what the schema says, adding no new syntax or constraint detail. Baseline 3 applies.

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 ('Create a status page') plus the scoping detail that the checks appear in order, which distinguishes it from updown_update_status_page and updown_list_status_pages. It does not explicitly name siblings, but the create-vs-update-vs-list split is unambiguous.

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?

Use is implied by 'Create a status page' and the auth note, but there is no explicit when-to-use guidance, no statement of when to prefer update_status_page instead, and no mention of prerequisites such as needing existing check tokens from updown_list_checks. Adequate but with clear gaps.

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