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

No annotations are provided, so the description carries the full behavioral burden, and it discloses nothing about input format, output shape, edge cases (e.g. windows larger than the series), or determinism. The single sentence adds zero behavioral information.

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 single sentence is short but that brevity reflects under-specification rather than efficient communication. No useful content is front-loaded because there is no useful content.

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?

For a 2-parameter computational tool with no annotations and no output schema, the description is completely inadequate. An agent has no basis to determine input format, window semantics, or return value.

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%, so the baseline is 3. However, the schema's own descriptions ('Values to process', 'Window to process') are near-vacuous, and the tool description adds nothing about expected formats (comma-separated list? JSON array?) or window units.

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 'Rolling Max: Maximum of rolling' essentially restates the tool name, which is a tautology rather than a statement of what the tool does. It never says it computes a rolling/moving maximum over a sliding window, nor does it distinguish itself from siblings like x402-rolling-min or x402-cumulative-max.

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 such as x402-rolling-min, x402-moving-average, or x402-cumulative-max. No prerequisites, no exclusions, no context of any kind.

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