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

With no annotations, the description must carry the behavioral load, and it does disclose the output shape (a schedule, not a single value) and that access is wallet-gated with 5 free trial calls. However, it says nothing about which parameters are required for which method, that all inputs are string-encoded numbers, or what an invalid/partial input yields.

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 definition is a single front-loaded sentence that states the artifact and the supported methods with no wasted words. The only drag is the emoji-laden free-trial promo tail, which occupies space without helping the agent decide or call.

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 8-parameter tool with zero schema descriptions, no annotations and no output schema, the description is too thin: an agent cannot tell which parameter set applies to which depreciation method or what units/formats the string inputs expect.

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 coverage is 0% across 8 parameters, so the description must compensate, but it only names cost, salvage and life. The meaning of rate, value, years, residual and method (beyond the two method names) is left entirely unexplained, and no format or required/optional guidance is given.

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 names a concrete verb and artifact ('Builds a ... depreciation schedule') and specifies the two supported methods (straight-line, declining-balance) plus key inputs (cost, salvage, life). It is specific enough to identify the tool without ambiguity, though the 'Depreciation:' prefix merely restates the tool name and the field lists are partial.

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 guidance on when to choose straight-line versus declining-balance, when this tool is preferable to sibling finance calculators (loan, npv-calc, dilution), or what preconditions exist. The only extra sentence is a promotional free-trial note, which is not usage guidance.

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