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

With no annotations, the description carries the full behavioral burden and discloses nothing: no computation formula (e.g. NOI / debt service), no units or currency assumptions, no indication of what is returned or whether the ratio is a percentage or multiple. An agent cannot predict the output at all.

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 shortness here comes from under-specification rather than efficiency: the single clause is a duplicated label with no front-loaded purpose, no inputs, and no result. There is nothing for a sentence to waste because no information is conveyed.

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?

A financial calculation tool with zero annotations, no output schema, and only placeholder parameter documentation needs the description to supply the formula, input meaning, and return shape. It supplies none of them, leaving the agent unable to call it correctly or interpret a result.

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 reported at 100%, so per the rubric baseline this is a 3, and the description adds no meaning beyond the schema. The schema text itself is vacuous ('DebtService to process', 'NetOperatingIncome to process'), but the rubric assigns the baseline to the structured field rather than the prose.

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 'Debt Service Coverage: Debt Service Coverage', a verbatim restatement of the tool name with no verb, no statement that it computes a ratio, and nothing that separates it from sibling finance tools like x402-interest-coverage or x402-current-ratio. It names a concept but never says what the tool does with it.

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 when-to-use guidance, no prerequisites, and no mention of alternatives. The only faint signal is that the term 'Debt Service Coverage' implies a financial-ratio context, from which an agent might infer it is used with income and debt figures, but nothing is stated.

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