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

Annotations already indicate readOnlyHint=false, and the description reinforces this with 'Not read-only.' More importantly, it discloses that the page is created unpublished unless enabled, that the slug is first-come across the platform and moving it later breaks links, and that the slug should be confirmed with the user. These are critical behavioral details that go beyond the annotations and significantly inform the agent.

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 sentences, each carrying essential information. The core purpose is front-loaded, followed by the default state, slug warning, and a pointer to the sibling tool. No wasted words and the structure is logical.

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 creation tool with an output schema, the description covers the key aspects: what it does, default behavior, important caveats about the slug, and the next step for adding monitors. The output schema handles return values, and the annotations cover idempotency and read-only status. Nothing an agent needs to call this correctly is missing.

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?

The schema covers 100% of parameters with descriptions, so baseline is 3. The description adds valuable context for slug (public address, first-come, breaking links) and enabled (curation before publication), which enhances understanding beyond the schema. Name doesn't get extra treatment, but the schema already describes it adequately. Overall, it adds meaning beyond the schema.

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 states a specific verb and resource: 'Create a status page.' It also distinguishes itself from siblings by noting that monitors are added via add_status_page_components, so an agent knows exactly what this tool does and what it doesn't.

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 clearly instructs to use add_status_page_components for adding monitors, which is a key follow-up step. It also advises confirming the slug with the user before creating. It doesn't explicitly mention alternatives like update_status_page, but the create/update distinction is implicit in the tool name and the guidance provided is sufficient for correct usage.

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