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

Annotations already declare readOnlyHint=false, destructiveHint=false, and idempotentHint=false, so the mutation profile is covered structurally. The description adds real context — plan-based quotas and the fact that monitors/settings are separate calls — but says nothing about auth/permissions or what happens when the slug already exists, which matters for a non-idempotent create.

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 short sentences, front-loaded with the verb and the required fields; the quota note and the "added separately" scope note both earn their place. Slightly compressible but no filler.

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 3-parameter mutation with full schema coverage and annotations, the core guidance is present. With no output schema, however, the description never indicates what a successful call returns (e.g. an id needed to attach monitors), which is the main thing an agent needs to chain the next step.

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%, and every parameter carries its own description (name, slug, public default true), so the baseline is 3. The description only restates these as "name, address and visibility" without adding format rules or slug-uniqueness constraints 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?

States a specific verb and resource ("Create a status page") plus the three fields that define it, so an agent can distinguish it from vs_status_pages_list/get/update at a glance. It does not name a sibling alternative explicitly, but the create semantics are 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?

"Monitors and other settings are added separately" tells the agent this tool will not configure monitors, preventing misuse and pointing toward follow-up tools like vs_status_page_monitors_add. "Your plan sets how many you can have" gives a quota constraint. No explicit when-not or named alternative, so short of a 5.

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