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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world). The description adds useful behavior: a 100-item cap, a truncation marker in the result, and that returned data is 'safe article metadata' plus translation method. That is meaningful context beyond the annotations, though permissions and error behavior remain unstated.

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 tight sentences, front-loaded with the core action and limit, then the optional comparison. No filler, though the 'Pass blogId' clause reads slightly like schema duplication.

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?

An output schema exists, so return-value detail isn't required, and annotations plus description cover safety and limits. The main remaining gap is the absence of usage routing against sibling read tools, but for a bounded 2-param read tool this is nearly complete.

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%, so the schema documents both parameters. The description nonetheless adds semantic value: it clarifies that blogId triggers a comparison against 'at most 100 configured locales' and yields missing-translation info, which is more than the schema's one-line parameter note conveys.

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 and resource ('List locale versions of one article') and names the grouping key `originalArticleId`. It distinguishes itself from read siblings like get_article or search_articles by scoping to translations of one source article, though it doesn't explicitly name an alternative.

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?

Implies usage — you call it to enumerate translations of an article, and optionally pass blogId to compare against configured locales. But it gives no explicit when-to-use vs get_article or get_blog_localization_summary, and no exclusions.

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