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

Annotations already mark it read-only, idempotent, non-destructive, and closed-world; the description adds useful behavioral context beyond annotations: the overview is bounded, the metadata is safe, it returns at most 24 locales, and it does not download the phrase dictionary. No contradiction exists.

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 sentences, front-loaded with what the tool does and when to use it, followed by a concise boundary ('without downloading the project phrase dictionary'). No filler.

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-paramerer tool with a full input schema, a declared output schema, and rich annotations, the description is complete enough: it gives the precondition, the resource, and the main limitations. Nothing needed for a correct invocation is missing.

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% with a clear description of projectIdOrName, so the schema already carries the parameter meaning. The description reinforces that it accepts an id or name and that the project must be known, but adds no new parameter-level syntax or format details.

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 uses a specific verb ('Render') and resource ('bounded overview for a known MultiLocale project') and clarifies the scope with 'safe project metadata and up to 24 configured locales.' The 'without downloading the project phrase dictionary' clause differentiates it from content-export/list-style siblings, so an agent can tell it apart.

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?

It states explicit invocation context: 'Use this after listing projects or when the user provides a project id or name.' This makes the precondition clear, but it does not list exclusions or name alternative tools such as get_project or export_locale_dictionary.

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