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

Annotations mark this as destructive (destructiveHint=true), and the description does not contradict that. However, the description never discloses whether calling the tool replaces the entire existing whitelist or merges with it. Given the 'add Y' example, this ambiguity could lead an agent to pass only the new seller and accidentally wipe the authorized list.

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?

The description is concise, front-loaded with the core purpose, and every sentence earns its place: purpose, precondition, trigger examples, and exact-name guidance. No filler or redundant restatement.

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 covers purpose, preconditions, trigger phrasing, and exact seller-name handling. However, it omits the overwrite-versus-merge behavior, which is a critical piece of context for a destructive set operation and for correctly handling 'add Y' requests.

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 the baseline is 3. The description adds one useful operational detail—seller names must be passed exactly as they appear on Amazon—but provides little else beyond what the schema already states.

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 states a specific action ('Save') with a clear resource ('the authorized sellers for a brand') and explains the business purpose: the whitelist that makes unauthorized-seller detection possible. It also distinguishes naturally from the sibling authorized_seller_list by framing this as a write operation.

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 description gives explicit trigger phrases ('these are my authorized sellers for X', 'add Y to my authorized list') and states a precondition: the brand must already be tracked in the workspace. It does not explicitly name the alternative read tool, but the save-vs-list distinction is strongly implied.

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