npmRepoStats

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

Annotations already provide readOnlyHint, openWorldHint, and idempotentHint, so the description's main job is to add context. It does not contradict annotations, but it adds little behavioral detail beyond the high-level purpose, such as whether results are from live GitHub API or cached, or what 'statistics' entails.

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 a single concise sentence that front-loads the core action and resource. Every word is necessary, and there is no repetition or fluff.

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?

Given the presence of an output schema and the tool's relative simplicity, the description provides a minimal but adequate high-level context. However, for a tool with many siblings, it lacks specifics about what statistics are included (e.g., stars, forks, open issues) and how it differs from other stats tools.

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%, so the schema already fully documents both parameters. The description adds no extra meaning or context about the parameters beyond the tool's overall purpose, which meets the baseline.

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 the verb 'Get' and the resource 'repository statistics for NPM packages', which is specific enough to indicate the tool's main function. However, it does not differentiate from sibling tools like 'npmScore' or 'npmMaintenance' that might also return repository-related data.

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?

No guidance is provided on when to use this tool over its many siblings (e.g., npmVersions, npmDeps). The description does not indicate typical use cases or when alternatives would be more appropriate.

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