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

Annotations already mark the tool as read-only and non-destructive. The description adds meaningful behavioral context by naming the King formula and specifying that it returns the reorder point, safety stock, and demand during lead time, going beyond what annotations provide.

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 core description is front-loaded and efficient, with a clear first sentence and a concise list of outputs. The promotional URL and 'Free tool by' sentence are not strictly necessary for tool invocation, preventing a perfect score.

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?

All required and optional parameters are documented in the schema, and the description covers the return values despite the absence of an output schema. The main gap is the lack of guidance distinguishing this tool from the safety stock sibling, but the tool remains invocable and understandable.

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?

Input schema coverage is 100%, so the schema already documents every parameter. The description adds the formula context but does not explain how individual parameters like demandStdDev or serviceLevel interact, which the schema also does not fully cover.

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 clearly states the tool calculates the reorder point for an inventory item and lists the returned values. It does not explicitly distinguish itself from the closely related calculate_safety_stock sibling, so it misses the top score.

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 guidance is given for when to use this tool versus siblings like calculate_safety_stock. The phrase 'when to place a new order' implies the intended use case, but there are no when-not-to-use instructions or alternative routing.

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