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

Annotations already state readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds domain content about what the guides include, but it does not describe return structure, coverage limits, or whether the list is static or dynamically assembled.

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 description is a single efficient sentence, front-loaded with the resource domain. The examples and the content summary both add useful selection context without noticeable 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 low-complexity, no-parameter, read-only listing tool, the description covers the domain and content sufficiently. It could be slightly more explicit about what is returned as a list, but the annotations and empty schema carry most remaining burden.

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?

The tool has zero input parameters, so there are no parameter semantics for the description to clarify. The baseline for a no-parameter tool applies, and the description does not need to compensate for schema gaps.

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 a specific resource: guides to Japanese procedures requiring translated English documents, with concrete examples and stated content. The name supplies the 'list' verb, so the agent can tell this is a guide-listing tool, though the description itself could more explicitly say it returns a collection.

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?

The examples imply when the tool is useful, such as for tax deductions, marriage registration, or birth registration involving translated documents. However, it gives no explicit when-to-use guidance, no exclusions, and does not name alternatives among siblings.

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