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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so safety is covered. The description adds useful ordering context ('newest first') and the underlying endpoint, but says nothing about pagination constraints or that the sort parameter can override the newest-first default.

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 short sentences with zero waste, and the key scope fact and ordering are front-loaded ahead of the endpoint detail.

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 read-only list tool whose schema fully documents pagination (page/offset/limit/sort/order_by), the description provides enough to call it correctly. It stops short of explaining the continuation pattern or that sort/order_by can change the 'newest first' default, which would matter to an agent paginating or sorting.

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%, so all six parameters are documented in the schema itself. The description only references store scope and ordering, adding no syntax or default details beyond what the schema already supplies. 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 (list) and resource (open sales) scoped to a store, and 'not yet closed' implicitly distinguishes it from list_closed_sales. It does not explicitly name the sibling alternative, keeping it just shy of a 5.

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 phrase 'not yet closed' signals when to use it versus closed-sales alternatives, but there is no explicit when-not guidance or named alternative. Usage is only implied.

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