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

No annotations are provided, so the description must carry the full behavioral burden, but it offers no information about mutability, return format, ordering rules, or error handling. For a tool with an ambiguous verb, this is a severe gap.

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 extremely short, but it is a repetitive tautology that wastes the opportunity to provide clarity. While concise, it fails to front-load any meaningful information.

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?

Given the complex sibling set and the lack of annotations or output schema, the description is completely inadequate. It does not explain the tool's behavior, return values, or usage context, leaving the agent unable to call it correctly.

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% and there is only one parameter ('values'), so the schema already documents the input. The description adds no additional meaning, resulting in a baseline score of 3.

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 'Sorted Array: Sorted Array' is a tautology that merely restates the tool name. It does not clarify what the tool actually does to the input – whether it sorts, checks sortedness, or returns a sorted copy – leaving the operation ambiguous.

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 indication of when to use this tool versus alternatives is given. With many sibling tools like x402-is-sorted or x402-sort-numbers, the lack of routing guidance leaves the agent guessing.

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