x402_sec

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

Because no annotations are provided, the description carries the burden of behavioral disclosure. It does add useful context by stating the per-call cost in USDC, which is a meaningful side effect. It does not, however, describe the output format, failure behavior, rate limits, or whether any authentication is needed.

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 a single short sentence with the core subject front-loaded and the cost parenthetically appended. It is scannable and contains no filler, though it is brief enough that some behavioral and usage responsibilities fall on the schema.

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 one-required-parameter tool, the ticker schema plus the description is enough to make a basic call. However, with no output schema, no annotations, and no relation drawn to sibling tools, it leaves the response shape and exact data scope unspecified.

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%, and the ticker property already includes its type and an example ('AAPL'), so the structured schema carries the parameter meaning. The description adds no additional parameter detail, which aligns with the baseline score for full schema coverage.

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 phrase 'SEC company financial facts' names a concrete resource and makes the tool's domain clear, and the required ticker parameter tells the agent what input is expected. However, there is no explicit action verb like 'get' or 'fetch', and the description does not differentiate it from siblings such as x402_stock or x402_search.

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?

The description provides no guidance on when to use x402_sec instead of related financial or search tools. No when-to-use conditions, exclusions, or alternatives are mentioned, so the agent must infer the appropriate context.

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