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

Annotations are absent, so the description must disclose behavior fully. It only says 'latest version of a Go module' and gives no detail about what the tool does with that version, where it fetches it from, or what the result looks like. For a simple lookup this may be acceptable, but it does not go beyond the headline claim.

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 extremely short, which earns credit for brevity, but it reads more like a subtitle than a functional definition. It lacks a verb and does not front-load actionable instructions, so it does not fully 'earn its place' as a helpful description.

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?

The tool is simple, and an output schema exists, so return values may be covered elsewhere. However, the description omits essential context: the input format, the meaning of the optional parameter, and the relationship to sibling Go module tools. Without annotations, the overall package is incomplete for confident invocation.

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 0% and the sole parameter 'q' has no description. The description does not explain that 'q' is likely a module path or name; the agent must infer this from the tool name. That inference is not compensation because the description itself adds no parameter meaning.

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 states a specific resource ('Go module') and a specific aspect ('latest version'), which is meaningful but phrased as a noun phrase rather than an action. It does not distinguish this tool from the closely related siblings gomod and goproxy, both of which likely also concern Go modules.

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?

There is no guidance on when to use this tool instead of alternatives. With gomod and goproxy in the sibling list, an agent has no way to know which Go module tool is appropriate for a given task; the description offers no selection criteria or exclusions.

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