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

The annotations already declare readOnlyHint=true, idempotentHint=true, non-destructive behavior, and closed-world scope. The description adds useful scope behavior by ruling out fee lookup and currency conversion and by framing the result as a "starting" price, but it does not describe the return format, rounding behavior, or calculation formula, which is a gap given there is no output schema.

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 two compact sentences with no wasted language. The purpose and the key scope constraints are front-loaded, making it easy to parse quickly.

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 an 11-parameter calculator with full schema coverage and strong annotations, the description adequately explains what the tool computes and its explicit-data-only scope. It is slightly incomplete because it does not describe the return value or calculation result shape, though the tool name and description make the output concept reasonably clear.

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%, so the schema already documents all 11 parameters in detail. The description summarizes the input categories (costs, minutes, hourly costs, fees, buffer) but adds no parameter-level syntax or format details beyond what the schema provides.

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 uses a specific verb ("Calculate") and a precise resource ("a starting selling price"), and it distinguishes the operation from sibling tools by focusing on explicit costs, minutes, fees, and a profit buffer. An agent can tell this is a pricing calculator rather than a payback, setup, comparison, or lookup tool.

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 gives clear context: use explicit per-item costs, minutes, hourly costs, fees, and a profit buffer. The clause "No fee lookup or currency conversion" provides a useful scope exclusion, though it does not explicitly name alternative tools or state when-not-to-use conditions beyond that exclusion.

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