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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description adds meaningful behavioral detail beyond that: it discloses that cover/stock status and network/reorder advice are conditionally withheld, which is non-obvious output behavior. No contradiction with annotations.

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 dense but free of filler, front-loading the resource and key reported fields before explaining withholding conditions. The heavy domain terminology slightly reduces readability, but every sentence earns 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?

With no inputs and no output schema, the description carries the burden of explaining both returned content and conditional omissions, which it does. It could be more complete by defining terms like 'qualified velocity' and 'arrival evidence,' but for a no-parameter read-only snapshot it is largely sufficient.

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?

The schema has zero parameters and schema description coverage is 100%, so the baseline is 4. The description cannot add parameter-level meaning, but it does contextualize what the returned inventory information covers and under what conditions additional data appears.

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 resource (FBA and AWD physical inventory components) and a clear reporting verb ('Reports quantities and evidence gaps'). It is specific enough to distinguish this tool from the sibling getters, which target different resources such as keywords, sales, or campaigns.

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 no explicit guidance on when to use this tool versus alternatives, nor does it name any sibling for comparison. The intended use is only implied by the tool name and the resource-focused wording, not by any stated selection criteria.

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