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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, so safety is covered. The description adds the seller-role requirement and implies partial updates (you can change just price or just description), but does not state what happens to omitted fields or that the operation is non-idempotent.

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 front-loaded sentence with zero filler. It is efficient, though it is terse enough that a second sentence on partial-update semantics would have earned its place.

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 5-parameter mutation tool with no output schema, the description is minimally adequate: schema covers all params and annotations cover the safety profile. It leaves out the important behavioral fact that unspecified fields are left unchanged, and does not route the agent toward delete_listing for permanent removal.

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 coverage is 100%, so every parameter including bounds (price >= 200, share 0-50) and the active toggle semantics is already documented in the schema. The description merely mirrors the field list without adding format or constraint detail, 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 ('change') and resource ('listing') and enumerates the mutable fields (price, description, reseller share, pause). The 'Seller:' prefix signals the role. It is distinguishable from create_listing/delete_listing by the 'change/pause' framing, though siblings are never named.

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?

No explicit when-to-use or when-not. In particular it never says that pausing (active=false) is the reversible alternative to delete_listing, nor that this is a partial-update tool. Only the implicit 'Seller:' role hint is present.

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