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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds the useful fact that the catalog carries prices and categories (effectively a return-content summary, valuable since there is no output schema), but says nothing about ordering, size, or whether the catalog is complete.

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 short sentence with no waste and the key content (returned fields) front-loaded. The fragmentary phrasing without a verb is a minor style cost rather than verbosity.

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 is the only source of return-value information, and it does name the fields – a meaningful contribution. However, it leaves the document-vs-document-type ambiguity and the absence of any usage context unresolved for a tool that is presumably the catalog entry point in a 5-tool family.

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 only parameter (lang) is fully documented in the schema, including the important caveat that UI labels are localized while document content stays English. The description does not mention lang at all, so it adds nothing beyond the schema – baseline 3.

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 identifies the resource and discloses the returned fields (ids, prices, categories), but it is a noun phrase with no verb, and it says 'document types' while the tool name says 'documents' – an ambiguity an agent must resolve. It gives no contrast with siblings like get_document_fields or render_document.

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 guidance, no prerequisites, and no mention of the sibling tools it competes with (get_document_fields, get_state_rules, validate_document, render_document). An agent must infer from the name alone that this is the discovery/catalog entry point.

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