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

The readOnlyHint annotation is present, but the description adds only a price mention ('Prix: 0.050 USDC') without explaining the tool's behavior, such as what happens when the payment_tx_hash is provided or what data is returned. No additional transparency beyond the annotation.

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 very short, but it is under-specified and promotional. The single sentence does not earn its place because it fails to explain the tool's function or structure, making it more like a tagline than a functional description.

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 tool with a payment parameter and no output schema, the description is grossly incomplete. It omits what the tool returns, how the payment hash is used, and whether any prerequisites exist. The agent cannot understand the tool's full behavior.

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 schema's description of payment_tx_hash covers 100% of the parameter. The description does not add any extra semantic value for the parameter, but the schema already provides adequate meaning, so the baseline applies.

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 promotional phrase about a Caribbean agro-processing market, but it does not state an action or resource. It lacks a verb like 'get' or 'retrieve', making it vague and not distinguishable from sibling tools by functionality.

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 given on when to use this tool versus alternatives. It does not mention use cases, prerequisites, or comparable sibling tools, leaving the agent without the context needed to choose correctly.

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