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

Annotations already declare readOnlyHint, idempotentHint and openWorldHint, so safety is covered. The description adds the meaningful behavioral point that the content is authoritative and must not be invented ('none of it is safe to invent'), which tells the agent to treat the output as ground truth. It stops short of describing freshness, caching, or return shape, but an output schema exists.

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?

The instruction is front-loaded in the first sentence and the rationale follows immediately. The page table is longer than a bare list but each line earns its place by adding selection semantics; there is mild duplication with the schema enum, which keeps it from a 5.

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?

Single required parameter fully documented, annotations cover the safety profile, and an output schema handles return values. Nothing an agent needs in order to invoke 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?

Schema coverage is 100% and the single param already lists valid values, so baseline would be 3. The description goes further by annotating each page value with what it contains ('How a dispute is decided, by whom, and on what evidence'), which helps the agent pick the right page rather than guessing from a slug.

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 ('Read one of the published pages') and immediately scopes it to answering questions about how the product works. The enumerated page list makes the retrieval domain unambiguous, and it is trivially distinguishable from the sibling payment-operation tools.

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 it rather than guessing' plus concrete examples ('what the fees are, how a dispute is decided') tells the agent exactly the class of question this tool answers. It does not explicitly state when not to use it or name an alternative, but the sibling tools are transactional operations rather than competing documentation sources, so the routing ambiguity is low.

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