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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, so the safety profile is covered. The description adds genuine value on top: the tier-dependent window (30 vs 90 days) and the auth behavior ('a guest call answers 401 and starts the OAuth flow'). It stops short of return format/pagination detail, so not 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?

It is compact at roughly three sentences and front-loads what is returned, but the ornamental phrasing ('the shelf beside it', 'its neighbours on the shelf') spends words on metaphor rather than on semantics, slightly hurting legibility.

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, the description does the job of describing returns (views, clicks, impressions, top queries) along with tier windows and auth requirements. For a single-param read tool this is close to complete, though it omits pagination/response-shape specifics.

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% and there is a single 'domain' parameter, so the schema already documents it fully. The description adds nothing about the domain argument (format, matching, case), 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?

It states the resource clearly: card views, click-throughs, plus Google impressions/clicks/top queries. The purpose (owner-facing card analytics) is decipherable, but the metaphorical phrasing ('the shelf beside it') and the absence of a clean verb mean it never contrasts itself against siblings like atlas_owner_card or atlas_my_listings.

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?

Usage is only implied - it signals that this returns your card's performance and that it requires an inite.ai account, but it never states when to call this versus atlas_owner_card or atlas_owner_premium explicitly. The tier split (free=30 days, premium=90 days) hints at context but isn't framed as a selection condition.

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