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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the READ-ONLY opener is largely confirmatory. The description nonetheless adds real behavioral context the annotations do not: the possible status values (DRAFT | SUBMITTED | APPROVED | REJECTED) and the visibility rule that only APPROVED is customer-visible. Pagination/large-result behavior is not described (the schema's max_pages hints at it), keeping this below a 5.

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?

Four dense sentences with the read-only marker and the core subject front-loaded, followed by the returned-field list, the visibility caveat, and the sibling routing. Every clause carries information; 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 low-complexity list tool with no output schema, the description covers the return payload (status enum, badge, update date) and the visibility semantics, plus routing to the right sibling. Minor gaps remain on pagination/volume behavior, but nothing essential for correct invocation 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 description coverage is 100% and both parameters (max_pages, account_id) are documented in the schema itself. The description adds no syntax, defaults, or format detail beyond that, so the baseline 3 for schema-carried parameters is correct.

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 A+ Content documents of the seller on this marketplace) and enumerates the returned fields (status, badge, update date). It explicitly differentiates itself from the sibling audit_aplus_coverage, so an agent can route correctly 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?

Gives an explicit when-to-use-elsewhere rule: for the question 'how much of my catalog has A+' use audit_aplus_coverage, not this. The alternative tool and the condition that selects it are named directly, leaving nothing to inference.

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