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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the bar is lower; the description still adds useful context by disclosing sort order ('most recently updated first') and the shape of returned records. It stops short of noting pagination or rate-limit behavior.

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, zero waste: the first front-loads what is returned and its ordering, the second lists the filters. Every clause earns its place.

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 helpfully enumerates returned fields, making the tool callable without further guesswork. The only gap is the undocumented 'limit' parameter and no hint about result volume, which is minor.

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?

Description names three of the four filters and clarifies level semantics ('level (1 to 4)'), complementing the schema's 75% coverage. It says nothing about the 'limit' parameter, which the schema leaves with only constraints and no description.

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 verb+resource ('US State Department travel advisories') and even enumerates the returned fields (country, level, summary, official page) and ordering. The domain is clearly distinct from siblings like list_cyber_advisories, though it does not explicitly name any sibling.

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 clause 'Filter by country, minimum level or update date' implies how to narrow results but gives no when-to-use/when-not guidance or alternative tools. Usage is implied rather than stated.

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