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

No annotations are provided, so the description carries the full burden. It usefully names the returned fields (viewer, timestamp, device, duration), which is real value given there is no output schema, but it says nothing about authorization requirements, privacy masking of viewer identities, result limits, or whether long-term historical data is retained.

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?

One compact sentence that front-loads the action and lists the enums of the response in a scannable order. Zero padding or restatement of the name.

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 no-annotation, no-output-schema tool it does describe the return payload, which is the most important missing structured information. However, permission requirements and the format of the required documentId are absent, leaving meaningful gaps before an agent could call it reliably.

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% for the single parameter, and the description only alludes to it as 'a document'. It does not specify whether documentId is a raw ID, a UUID, or a path/URL, nor any constraints, so it fails to compensate for the undocumented schema.

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?

States a specific verb ('Return') and resource ('view analytics') and enumerates the exact payload dimensions (who, when, device, duration), so an agent immediately knows what data this yields. It does not explicitly contrast itself with the sibling tools, but those are share-link and document-listing operations that are plainly unrelated.

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 call this versus alternatives, and no prerequisites stated, such as whether the caller must own the document or have analytics permissions. The agent is left to infer that this is an analytics lookup for a document it already has an ID for.

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