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

The annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so 'Read-only; changes nothing' merely restates structured data and earns no credit. Nothing is added about ordering, pagination, what the default limit of 40 means in practice, or whether results are cached; the trailing sentence about money in minor units is irrelevant noise for a tool with no monetary parameters.

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 definition is short and front-loaded, which is good, but only two of its three sentences serve this tool. The currency-formatting sentence is dead weight here and dilutes an otherwise tight statement.

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 carries the burden of describing what comes back, and it does not: the agent cannot tell whether the result is a list of field paths, a count, a grouped-by-entity structure, or whether it includes the source string. Combined with the absent sibling routing, the definition is under-specified for its role.

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%, so the schema already documents locale, entity and limit with an enum and a stated default. The description adds nothing about parameter meaning, and its only concrete statement (money as integer minor units) does not apply to any of these parameters, so the baseline of 3 is the right ceiling.

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 phrase 'What still needs translating' identifies the resource (untranslated content) clearly enough that an agent knows what the tool surfaces. However it is a noun phrase with no verb (list/return), and it never distinguishes itself from the sibling translations_set, which is the natural point of confusion.

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 prerequisite (e.g. a locale must be configured), and no routing to alternatives. The obvious counterpart, translations_set, is never mentioned, so the agent must infer that this tool reads and that one writes.

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