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

With no annotations, the description carries the full burden of behavioral disclosure, yet it only says 'Works by author/keyword (Crossref)'. It does not mention result limits, pagination, query syntax, default behavior, error conditions, or that this is a read-only lookup, so an agent cannot anticipate the tool's runtime behavior.

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 short and easy to scan, with no filler. It loses a point because it repeats 'Crossref' twice and uses a label-like prefix rather than a crisp verb-first sentence.

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 one-parameter lookup with an output schema, the description provides a minimum viable understanding of purpose and query. However, the absence of behavioral detail and usage guidance leaves notable gaps, especially given no annotations and a large sibling set offering similar scholarly search.

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?

The single parameter q has no schema description, but the phrase 'author/keyword' gives a basic hint that q is the author or keyword query term. This partially compensates for the 0% schema description coverage, but it does not explain how to combine terms, specify an author name format, or use the empty default.

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 the tool returns Crossref works by author or keyword, identifying both the data source (Crossref) and the subject of the query. It is clear enough to distinguish from unrelated tools, but it lacks an explicit verb such as 'search' or 'lookup' and does not differentiate itself from sibling academic-search tools like openalexauthor or pubmed.

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 about when to prefer this tool over openalexauthor, pubmed, arxiv, semanticscholar, or datacite. The only contextual signal is the parenthetical '(Crossref)', which implies the source but does not state selection criteria or exclusions.

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