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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and closed-world scope, so the safety profile is fully covered. The description usefully discloses what the comparison returns (cost, best-for, pros/cons, verdict), which matters since there is no output schema, but it adds no constraints, limits, or data-source context.

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 front-loaded sentence that names the operation and lists the output dimensions with zero filler. Every clause earns its place.

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 simple two-parameter, fully-enumerated read tool with no output schema, the description tells the agent what the result contains, covering the main gap. It is nearly complete, missing only any note on result format or ordering.

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% and both parameters carry enum-constrained values with descriptions, so the schema fully documents the inputs. The description adds no format, ordering, or semantic detail beyond what the schema provides; 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 (compare) and resource (two boat types), and enumerates the comparison dimensions (cost, best-for, pros/cons, verdict). This sets it apart from get-boat-type-details and recommend-boat-type implicitly, though it never names those siblings explicitly.

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 word 'side by side' and the two-parameter shape imply usage (use when evaluating two options against each other), but there is no explicit when-to-use, when-not-to-use, or pointer to the sibling tools that handle single-type details or recommendations.

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