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 provides none. It does not state that this is a computation, what formula is applied, whether inputs are parsed as strings/numbers, or what the 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?

It is short, but the single sentence is pure redundancy and carries zero information. Brevity without substance is under-specification rather than concise communication.

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 four-parameter financial calculation tool with no annotations and no output schema, the definition is completely inadequate. It gives an agent no basis to select, parameterize, or interpret the tool.

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 rubric baseline is 3 despite the description adding no parameter meaning. The schema descriptions themselves are generic placeholders ('Spot to process'), but the structured field coverage metric triggers the baseline.

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 a tautology: 'Option Intrinsic: Option Intrinsic' merely restates the tool name without stating a verb, resource, or what calculation is performed. It does not distinguish this tool from siblings like x402-option-time-value or x402-black-scholes-call.

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 when-to-use guidance, no prerequisites, and no mention of alternatives such as x402-option-time-value or x402-black-scholes-call/put. The caller is left to infer everything 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.