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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds real context beyond them: the specific upstream sources queried, the fact that the PatentsView citation graph is paused (a coverage limitation), and a 'not legal advice' disclaimer. It still omits return format and any rate/coverage caveats per source.

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 the core action and followed by the scope limitation and disclaimer. No filler or repetition.

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 two-parameter lookup tool with annotations covering safety, the description is nearly complete; the source-coverage and paused-graph notes are valuable. The one gap is that with no output schema, the shape of returned citation records (counts, fields, ordering) is left unstated.

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 the enum values for 'direction' are fully documented in the schema, so the description adds nothing beyond what structured data already provides. Baseline 3 is appropriate.

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 (list) and resource (documents cited by / citing a patent), plus the three data sources used. It clearly carves out scope versus the paused PatentsView citation graph, though it never names the actual siblings (get_patent, search_patents, search_prior_art) to differentiate against.

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 implied by the scope statement and the caveat that the full PatentsView graph is paused, which tells the agent when this tool is the available option. However there is no explicit when-to-use versus get_patent or search_prior_art, and no guidance on when 'direction' should be narrowed.

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