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

Annotations already establish readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so safety is covered. The description adds that the response includes vessel details, dimensions, and contents, plus the endpoint shape, but it does not discuss error behavior, missing ids, or response format.

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?

The description is compact and front-loaded: it states the single-vessel lookup and returned content first, then includes the endpoint path. There is no filler, and the endpoint path is at least useful for mapping vessel types to path segments.

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 read-only get-by-id tool with annotations and no output schema, the description gives enough to understand scope and returned content. It could be more complete about errors or response shape, but the key invocation context is present.

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 the schema already defines vessel_id and the vessel_type enum. The description restates the vessel categories and implies id-based lookup, but adds little semantic detail beyond the schema, so the baseline 3 is appropriate.

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 gives a specific verb and resource: get one vessel by id, and enumerates the vessel types (tank, barrel, barrel group, tanker, bin) with returned details, dimensions, and contents. It is clear enough to distinguish from list-style siblings, but it does not explicitly differentiate itself from vintrace_get_vessel_details_report.

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?

Usage is implied by 'by id': an agent should use this when it has a vessel id and wants a single vessel. However, there is no explicit when-to-use guidance, no exclusions, and no named alternative such as vintrace_get_vessel_details_report.

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