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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description still adds real behavioral context beyond them: newest-first ordering, cursor pagination semantics, the limit range/default, and the required read_catalog scope.

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?

A single dense sentence that front-loads what the tool returns and its ordering, then packs parameters and the scope requirement without filler. Every clause carries information.

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 covers the return ordering and pagination contract (next_cursor) that an agent needs. The only gap is that the accepted values for status are never enumerated, leaving the filter open-ended.

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 67%, with limit documented only via minimum/maximum/default keywords. The description compensates by restating the 1–100 range and default 25 and by clarifying that cursor is a created_at ISO string taken from next_cursor, adding format meaning the schema only partially conveys.

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 ('List the account's items') plus scope ('the account's'), ordering ('newest first') and pagination model ('cursor-paginated'). An agent can distinguish it from getItem (single) and listCatalogs (different resource), though no sibling is named explicitly.

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?

Usage is implied by the listing semantics and the stated prerequisite ('Requires scope: read_catalog'), but there is no explicit when-to-use guidance, no mention of when to prefer getItem or listCatalogs, and no exclusion conditions.

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