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

No annotations are provided, so the description carries the full burden, and it discloses nothing: not whether the operation mutates state, what format the output takes, nor any error or input-shape behavior. The text is purely tautological.

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 text is short, but its brevity comes from under-specification rather than efficiency — it conveys zero information. It is not bloated, yet no sentence earns its place because none says anything.

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 annotations, no output schema, and an entirely tautological description, an agent has no basis for deciding whether or how to call this tool. Nothing an agent needs is present.

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?

There is a single optional parameter and schema description coverage is 100%, so the baseline of 3 applies; the schema field 'values' carries its own description. The tool description adds no meaning beyond that, but the high coverage keeps this from dropping further.

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 is the name restated twice: "Standard Scale: Standard Scale." It gives no verb, no resource, and no indication of what is being scaled or how, so an agent cannot distinguish it from any of the hundreds of x402-* siblings.

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?

There is no when-to-use guidance, no prerequisites, and no named alternative. Nothing tells the agent what condition selects this tool over, for example, x402-standardize, x402-standardize-array, or x402-normalize.

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