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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is fully covered. The description adds the requested status vocabulary and hints at the shape of each card, but says nothing about pagination behavior, result ordering, or the market/status interaction beyond what a read-only list implies.

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 compact sentence with no filler, and the market scope is front-loaded ahead of the optional status filter. The colon-list of fields is dense but readable; only the missing leading verb keeps it from being perfectly structured.

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 an output schema present, the description need not explain return values, so its field list is bonus context. It still leaves an agent guessing about pagination (limit/offset defaults) and about how this differs operationally from get_banner_card, which is a notable gap for a four-parameter list tool.

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 0%, so the description must compensate. It does add real meaning for 'market' (one market) and supplies the three 'status' values that the schema's bare anyOf string lacks, but limit and offset are completely unexplained by either source.

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?

The description names the resource ('the cards of one market') and the returned fields (banner, media program, status, address), which clearly separates it from the singular sibling get_banner_card. It is a noun phrase rather than a verb-led statement, so the listing action is only implied by the tool name, but the scope is 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?

'optionally by status (unclaimed, claimed, registered)' implies the filtering use case, and 'one market' implies the required scoping. However, it never states when to pick this over get_banner_card or list_banners, nor any prerequisites or exclusions, so usage is only inferred.

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