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

The description provides critical behavioral context beyond the annotations, specifically stating 'No funds move until the wallet or user authorizes the x402 request.' It also details the concrete contents of the response (paid URL, free evidence link, wallet steps).

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 maximally concise. It efficiently front-loads the core function and the vital behavioral constraints in just two sentences, ensuring zero waste.

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?

Given that there are no input parameters, the description is highly complete. It fully defines the expected output data points and the transactional boundaries of the preparation step.

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?

Since the input schema contains zero parameters, the description cannot add semantic meaning to the inputs. A baseline score of 3 is appropriate for a tool where the structured data (schema) handles the entire input requirements.

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 extremely specific, defining the scope as an 'XRP 4H setup' that includes entry, liquidity-zone SL/TP, and nine indicators. The resource and asset are clearly named, allowing distinction from generic setups.

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?

It explicitly defines the condition for use: 'when the user wants a current XRP 4H setup.' While the sibling list provides context for alternatives, the description successfully guides the agent toward the purchase preparation intent.

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