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

Annotations already cover safety (readOnlyHint, idempotentHint, openWorldHint=false), and the description adds genuinely non-structural facts: results are newest-first, sourced from changelogs, and include doc'd-but-unreleased items. It stops short of describing response shape or how much is returned per package, which keeps it off a 5.

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?

Three short sentences, front-loaded with what the tool returns, followed by parameter usage and the fallback — no filler. The dense relative clause in sentence one costs a little readability but nothing is wasted.

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?

With no output schema and a nested 16-key object parameter, the description carries responsibility for explaining what comes back, and it does state content, ordering, and source. It's a bit thin on grouping/response structure per package, but an agent can call it correctly from what's given.

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 schema's own description already shows the package.json-shaped example, so the description largely restates it. The one addition the schema cannot express is the omission default ('the latest version of each package'), which is why this is a solid baseline rather than a 4-5.

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 names a specific verb+resource (what each @nuvui/* package added and changed) and pins down the data source (changelogs, docs-unreleased items), which is clearly distinct from the sibling read tools (get_page, get_tokens, search_docs). The first sentence's grammar ('after the versions a project has') makes it slightly harder to parse than it needs to be, but the domain and scope are unambiguous.

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?

It tells the agent exactly what to pass ('the @nuvui/* entries of the project's package.json') and what happens on omission ('the latest version of each package'), which is real usage context. It doesn't mention when to reach for search_docs or get_rules instead, so the alternative-routing dimension is absent.

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