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

No annotations are provided, so the description carries the full behavioral burden. It says nothing about determinism, expected units for current/voltage, the unit or format of the returned power, or whether any state is modified. For a stateless calculator some of this is implied, but nothing is actually disclosed.

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?

A single short sentence with the definition front-loaded before the formula. It is efficient, though the redundant 'Electric Power:' label repeats the name and adds nothing.

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?

With no annotations, no output schema, and unspecified units for either input, the definition is too thin for the agent to invoke confidently. It does not say what comes back (a number? an object?) or in what units the voltage and current are assumed.

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 100%, so the two parameters are already documented, and the schema descriptions ('Current to process') are generic. The formula P=VI tells the agent how the inputs relate, which is mild added value over the schema, so the baseline 3 applies.

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 specific computation and even supplies the governing formula (P=VI), so an agent immediately knows what the tool computes. It does not, however, distinguish itself from close siblings such as x402-power-v-i or the other ohms-law variants, leaving ambiguity in a very crowded namespace.

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 statement of when to use this instead of x402-power-v-i, x402-power, x402-ohms-law-v, or the other electrical calculators. The formula hints at the inputs, but the agent is left to infer selection from the name alone.

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