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

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it discloses nothing: no operation, no outcome, no return value, no side effects. 'Progress Percent' alone does not tell the agent what happens when the tool is invoked or what its result represents.

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 this is under-specification, not conciseness — the entire content is a restatement of the name. No sentence earns its place because there are no substantive sentences conveying information about the tool.

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, zero parameters, and a tautological description, the definition is completely inadequate for an agent to determine what the tool does or when to invoke it. The tool is functionally indistinguishable from numerous percentage-related siblings.

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 input schema is an empty object with zero parameters, so schema description coverage is 100% vacuously. Per the 0-params baseline, the description is not required to document parameter meaning, and there is nothing for it to add. This dimension is not penalized even though the description contributes nothing.

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 'Progress Percent: Progress Percent' is a pure tautology that merely restates the tool name and title. It contains no verb, no resource description, and no statement of what the tool actually does. Given the hundreds of sibling tools (x402-percent, x402-percentage-of, x402-percent-of-value, etc.), an agent cannot distinguish this tool from any of them.

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 guidance whatsoever about when to use this tool versus any alternative. No sibling tool is named, no context condition is given, and no exclusions are stated. An agent has no basis to select this tool over the many similar percentage-related siblings.

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