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

Annotations already declare readOnly, openWorld, idempotent, and non-destructive. The description adds genuinely new behavioral context beyond that: a cost/allowance model ('Free within the daily allowance, then $0.003 USDC per call via x402'), which is the kind of rate/billing detail the annotations do not convey.

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?

Two short sentences, zero filler, and the core purpose is front-loaded ahead of the cost note. Every sentence earns its place.

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 an output schema present, the description need not explain return values, and the annotations carry the safety profile; the description covers purpose and cost. The main gap is the absence of any routing guidance relative to the many sibling search/work 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 coverage is 100% and there is only one parameter, so the baseline is 3. The description adds the meaning that the value is an OpenAlex work id, but the schema's own example ('cites:W2919115771') uses a filter syntax that the description does not reconcile, leaving mild ambiguity about the exact expected format.

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 relationship: 'Works that cite a given OpenAlex work id.' This clearly distinguishes it from sibling scholarly__work (a single work) and scholarly__works-search (general search) by naming the citation relationship, though it does not explicitly name those alternatives.

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 when-to-use, when-not-to-use, or alternative-routing guidance. The pricing sentence informs about cost but does not tell the agent when this tool is the right choice versus scholarly__works-search or scholarly__work.

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