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, yet it discloses nothing: no formula, no expected units (volts/farads), no output shape, no note that it is a pure computation. The single sentence adds no behavioral context whatsoever.

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 not concise in a useful sense: the single sentence is a tautological restatement of the title with no actionable content, so the brevity reflects under-specification rather than disciplined editing.

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 computation tool with no annotations and no output schema, the agent needs to know the formula and unit conventions to call it correctly. The description supplies neither, leaving the definition inadequate despite full schema coverage of the two inputs.

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% (voltage and capacitance each documented), so the baseline of 3 applies. The description adds no unit conventions or meaning beyond what the schema already states, but it also does not need to.

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 'Capacitance Energy: Energy of capacitance' restates the tool name rather than stating a verb+resource operation. An agent can infer it computes stored capacitive energy, but there is no verb, no mention of the E = ½CV² relationship, and no differentiation from the sibling x402-capacitance 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?

There is no indication of when to use this tool versus alternatives, no prerequisites, and no mention of related siblings such as x402-capacitance, x402-capacitive-reactance, or x402-energy. Usage must be entirely inferred from the name.

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