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

With no annotations, the description carries the full burden of disclosing behavior. It does reveal that the tool returns a live computed signal and mentions a 0.05 price paid via x402 in USDC on Base, which hints at a paid/authenticated call. However, it does not explain what the response contains, whether the wallet parameter is used for payment, how access is enforced, or any rate or billing specifics.

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 short and avoids excessive padding, but it is one dense sentence packed with ambiguous jargon such as 'per-member 30-period percentile rank' and 'plain Price 0.05 via x402.' It could be more readable and front-loaded with the core purpose before the calculation details.

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?

The tool appears moderately complex: it aggregates four series, computes rankings, and involves a payment mechanism. There is no output schema and the description does not explain the return shape, the meaning of 'per-member,' which four series are involved, or how the x402 payment works. An agent would struggle to understand what the tool actually returns or what calling it entails.

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 coverage is 100%, so the optional wallet parameter is already documented in the schema. The description adds a payment-related subtext via 'x402 (USDC on Base)' but does not explicitly connect it to the wallet parameter or clarify what the wallet is used for. The description therefore adds minimal value beyond the schema.

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 states it provides a 'live computed signal' and specifies the composite calculation approach, which gives some sense of purpose. However, it is vague about the actual data domain: the tool name suggests EIA energy data, while the description says 'Finance Signal Bundle' and never mentions energy or EIA. This weakens differentiation from the many sibling processed_* and signal_* tools.

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 guidance is provided on when to choose this tool over alternatives such as processed_energy, signal_energy, or other processed_* siblings. The description contains no when-to-use or when-not-to-use information, leaving the agent to infer the intended use case from the name alone.

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