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

Annotations declare readOnlyHint=true, idempotentHint=true, and openWorldHint=false, so the safety profile is well covered. The description adds that the checklist is grouped by priority and includes estimated costs, which is useful output context. However, it does not describe return format, pagination, or any behavioral nuance beyond what annotations already provide.

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?

Two sentences, front-loaded with the core purpose and scope ('universal boat gear and safety checklist'), followed by a key qualifier ('applies to any boat type'). No wasted words.

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 zero-parameter read-only tool with no output schema, the description provides adequate context: what it returns (checklist with costs and priority groups) and its universal applicability. It could be slightly more complete by mentioning the format (e.g., list vs structured JSON), but overall it is sufficient for an agent to call it correctly.

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?

The tool takes zero parameters, so the baseline is 4 per the rules. The description correctly implies no input is needed – it is a universal checklist. No parameter semantics are required.

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 clearly states it returns a 'universal boat gear and safety checklist with estimated costs, grouped by priority.' This is a specific verb (implied: get) and resource (gear checklist). However, it does not explicitly differentiate from siblings like 'compare-boat-types' or 'get-boat-type-details' – though the resource is distinct enough that an agent can likely infer the difference.

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 description says it 'applies to any boat type,' which implicitly tells the agent this is a general-purpose checklist not tied to a specific boat. However, there is no explicit when-to-use vs when-not-to-use guidance, no mention of alternatives, and no indication of when an agent should prefer this over other siblings.

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