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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is fully covered. The description adds the output fields (diameter, area, resistance, max current), but that information is already carried by the existing output schema, so the added behavioral value is modest.

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?

Front-loaded with the core conversion in the first sentence, and the whole description is short. The "Inputs:" and "Returns:" sentences are largely redundant given the schema and output schema, so a small amount of waste remains.

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 single-parameter, read-only converter with an output schema, the description covers purpose, input and returned quantities adequately. It is missing only the sibling disambiguation and precision/rounding context, which are minor here.

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% for the single 'awg' parameter, so the schema already documents the input. "Inputs: AWG number" merely restates it and adds no range, unit or format detail beyond the schema's min/max bounds; 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?

States a specific verb and resource: convert AWG wire gauge to diameter and resistance, with concrete output units (mm, ohms/m). An agent can distinguish this from most siblings, though it never names the nearest neighbors (e.g. calculate_cable_section, calculate_ohms_law) that could plausibly compete.

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?

"Use for electrical projects" is a domain label, not a usage rule; there is no when-to-use vs. when-not and no alternative named. The "See list_bundles for related 'conversions' calculators" line is a navigation pointer, not selection guidance.

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