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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds the composition of the returned score ('how the score is built'), which is mildly useful behavioral context, but says nothing about freshness, coverage gaps, or auth. Adequate, not rich.

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?

One dense sentence listing the return payload, followed by a compact Args clause. Front-loaded with the resource, no filler, and every clause carries information.

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 the enumeration of return fields is partly redundant, but the parameter format note closes the only real gap for this single-argument read tool. Nothing an agent needs to invoke it correctly appears to be 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 0% and the schema only says 'Country' as a string, so the description carries the full burden. It supplies the exact format (ISO 3166-1 alpha-3) plus concrete examples (FRA, USA, JPN), which is precisely the information needed to avoid passing 'France' or 'FR'.

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?

Names a specific resource (travel risk for a country) and enumerates the concrete outputs: composite risk score 0-5, advisory level 1-4, and alert counts by severity. It is clearly distinguishable in spirit from country_profile or travel_advisories, but it never names those siblings, so an agent must infer the boundary itself.

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?

Usage is implied by 'travel risk for a country' as opposed to, say, a static profile or a raw alert list, but there is no explicit when-to-use statement and no exclusion pointing to travel_advisories, active_alerts, or country_profile. The agent gets the gist but not the routing rule.

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