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 genuinely new information about the payload — it returns everything ranked by 7-day probability and includes risk bands and as-of dates — which matters because no output schema 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?

A single front-loaded sentence that names the ranking metric first and then the accompanying fields. Zero filler and nothing to trim.

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 zero-parameter, zero-output-schema read tool, the description supplies the scope (all scored countries), the sort key, and the return fields, which is most of what an agent needs. It could say more about scale or whether the list is exhaustive/capped, but nothing essential 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?

The tool takes zero parameters, so the baseline is 4; there is no parameter syntax the description needs to compensate for. Schema coverage is 100% and additionalProperties is false, leaving nothing ambiguous.

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 resource (all scored countries) and the ranking criterion (current 7-day shutdown probability), which is a real verb+resource statement. It does not explicitly differentiate itself from overlapping siblings like get_shutdown_risk or get_high_risk_countries, so it falls short of a 5.

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 description implies a leaderboard/ranking use case through 'sorted by current 7-day shutdown probability', but never states when to pick this over get_shutdown_risk (single-country detail) or get_high_risk_countries. Usage is inferable but not explicit.

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