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

Annotations already declare readOnlyHint, idempotentHint and non-destructive, so safety is covered. The description adds real behavioral context beyond them: an anonymous call returns ok=true, authenticated=false and an empty list rather than an error, and sign-in is only needed for later keep/manage operations. That edge-case disclosure is genuinely useful.

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?

Front-loads the purpose and keeps the auth behavior in the second sentence, but the mid-sentence pivot to 'then create the page directly with page_create_from_brief' is slightly awkward and mixes usage guidance into the purpose statement.

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 simple read-only list with one optional parameter, an output schema, and annotations covering safety, the description supplies everything an agent needs: scope, auth behavior, and the fallback tool for the create path.

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 the single optional 'limit' parameter is fully documented in the schema with min/max. The description adds no further meaning about the parameter, so 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 ('List') and resource ('landing pages saved to the signed-in account'), and the account scoping separates it from page_get/page_preview which operate on a specific page. An agent can identify the operation and its scope without opening the schema.

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?

Explicitly covers when this is safe to call (no sign-in required), what happens in that case, and routes the agent to the alternative page_create_from_brief when the goal is actually creating a page. Both the usage condition and the alternative are named.

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