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

Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false, so the bar is lower. The description adds genuine behavioral context by clarifying that this returns configuration metadata rather than price values, and cites the underlying endpoint GET /rest/items/sales_prices so an agent can reason about scope. It does not discuss pagination behavior, but the schema already carries that.

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?

Two sentences, front-loaded with the core purpose, with the disambiguation in the trailing sentence. The parenthetical field enumeration is dense but earns its place by telling the agent what each record contains.

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 usefully enumerates the shape of returned records (id, type, names, stores, countries, currencies) and names the endpoint. Pagination semantics are left entirely to the schema, which is acceptable given 100% coverage, but a word on result ordering or typical volume would have closed the remaining gap.

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 (page, items_per_page) are fully documented in the schema, including the 'ask for the next page when is_last_page is false' hint. The description adds no additional parameter meaning, 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+resource ('List the sales price configurations') and then defines what a configuration contains (id, type, names, applicable stores, countries, currencies), which is more than the title restated. It explicitly separates these configuration records from actual variation prices by pointing at plentymarkets_list_variations with variationSalesPrices.

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?

The second sentence effectively routes the agent: if you want the prices attached to a variation, use list_variations with variationSalesPrices instead. That is a clear sibling alternative, but it does not state an explicit trigger condition for this tool or any prerequisite.

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