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

With no annotations, the description carries the full burden, and it does disclose the core behavior (a division that yields a multiple). It does not mention edge cases such as ebitda of zero or negative values, unit/currency assumptions, or precision of the returned value. Adequate for a trivial pure function but not rich.

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 computational meaning is front-loaded in a single tight sentence with no waste. The trailing trial-call emoji note is promotional filler that does not help an agent call the tool, but it costs only a few tokens.

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 two-parameter arithmetic tool with no output schema, the description covers the operation and the return value. What is missing is input format guidance (string vs numeric, currency/unit conventions) and the zero/negative-ebitda edge case, which matter because both parameters are untyped strings.

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 0%, so the schema names the two parameters but explains nothing. The description partially compensates by stating the relationship ('divides enterpriseValue by ebitda'), which clarifies the role of each input. It still says nothing about accepted formats, units, or why both are typed as strings rather than numbers.

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?

States a specific verb and resource: it divides enterpriseValue by ebitda and returns the EV/EBITDA multiple. The purpose is unambiguous and an agent can identify it as a valuation-multiple calculator. It does not, however, differentiate itself from adjacent siblings such as x402-enterprise-value or x402-pe-ratio, which is the only thing keeping it off a 5.

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 never says when to reach for this tool versus the many other valuation calculators in the catalog. The only non-computational sentence is a marketing note about 5 free trial calls per signed wallet, which is pricing, not usage guidance. An agent gets no exclusion or alternative-routing information.

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