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

The description adds two useful behavioral facts beyond the annotations: the operation is reversible, and it must follow explicit client confirmation. This usefully qualifies the destructiveHint=true annotation without contradicting it.

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?

One tightly written sentence with no filler; the core action and key qualifiers come first, and the precondition is appended without diluting the point.

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?

The description is complete for a low-complexity, two-parameter tool, especially since an output schema exists and annotations cover idempotency/destructive behavior. The main remaining gap is the undocumented idempotencyKey semantics, which keeps it from a 5.

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?

With 0% schema description coverage, the description must carry parameter meaning, but it only explains productId ('by productId') and says nothing about the required idempotencyKey or how it should be generated/used. The name hints at its purpose, but the required parameter is left undocumented.

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 a specific action ('stop'), a precise resource ('seller-owned listing'), and the lookup key ('productId'), and the qualifier 'reversibly' distinguishes it from permanent delete/trash operations in the sibling set. This is enough for an agent to know what the tool does 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?

It clearly states the precondition 'after client confirmation' and restricts use to seller-owned listings, giving an agent context for when the call is appropriate. It does not name alternative tools or explicitly say when not to use it, so it stops short of a 5.

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