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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds that results are grouped by model-year and that returned slugs are reusable downstream, which is genuine beyond-annotation context, but it says nothing about result count, pagination, or what an empty/failed lookup returns.

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?

At three sentences it is not bloated and the query-filter sentence is well placed, but the leading fragment is garbled and front-loads jargon instead of the tool's action. One rewritten opening sentence would make the whole definition tighter.

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 one-parameter, annotation-rich read tool with no output schema, the description is nearly sufficient: it names the returned grouping and explains the slug's downstream role. The remaining gap is minor — no indication of result size or whether an absent query returns everything.

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 coverage is 100% and the single `query` parameter is already documented as "Make or model." The description's examples ("yamaha", "R7", "ZX-6R") add a little color on accepted casing and model formats but largely restate the schema, so the 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?

The description conveys the resource (bikes, grouped by model-year) and the filterable fields, but opens with the opaque phrase "Bikes Unstocked covers," which reads like internal jargon rather than a verb+resource statement. An agent can infer this is a listing tool, but only from the name and the sentence fragment, not from a clear stated action.

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 the slug with the other tools" implies a workflow link to get_build/get_parts, and the query filter is described as optional. However, it never states when to call this instead of the siblings, nor what the slug is used for concretely, so the routing guidance is implied rather than explicit.

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