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

The description adds a crucial non-obvious behavior beyond the annotations: the tool is monetized via x402, costs $0.25 USDC, and runs on Base or Arbitrum One. This is exactly the kind of auth/payment context annotations don't carry. It does not contradict the existing idempotent or destructive hints.

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 compact and puts the payment detail in the second sentence, but the first sentence is vague and wastes the front-loaded position on imprecise language. Brevity helps, yet clarity suffers because the core purpose is missing.

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?

Even with an output schema present, this is a paid endpoint with four parameters and no functional explanation. An agent cannot determine what compute_alerts does, when to pick it, or how to populate gpu and limit. The cost disclosure is helpful, but the overall definition is insufficient for correct invocation.

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 only 25%; gpu, limit, and idempotency_key are entirely undocumented in the schema. The description adds nothing about these parameters, forcing agents to guess their semantics. With such low coverage, the description should compensate but instead ignores parameters completely.

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 opens with 'Agents pay for work and prove what happened,' which is ambiguous and never mentions alerts, the tool's namesake. It names an endpoint and payment method, but not what the tool actually does or produces. This is too vague to distinguish from sibling compute 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?

There is no guidance on when to use compute_alerts versus compute_history or compute_spot_prices. The description only warns that the tool is paid; it does not state criteria, alternatives, or exclusions. An agent is left without a basis for selection.

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