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

With no annotations, the description carries the full behavioral burden and discloses almost nothing: no pagination behavior, no default for 'limit', no return shape, no freshness or ordering of headlines, no auth requirements. The topical category list (freight, fuel, canals, customs, war risk) is the only substantive content added.

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 compact sentences with the domain content front-loaded and no filler. Nothing is wasted, though brevity here comes at the cost of substance rather than being earned economy.

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 tool with no annotations, no output schema, and one of two parameters undocumented, the description leaves too many gaps: what 'limit' controls, what the default is, how results are returned, and whether 'country' filters or merely annotates. It is not complete enough for reliable invocation.

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 description coverage is 50%; 'country' is already documented in the schema as an ISO code and the description merely repeats that ('Optional ISO country code'). The 'limit' parameter is undocumented in both the schema and the description, so the description fails to compensate for the coverage gap.

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 the domain (shipping-affecting headlines covering freight, fuel, canals, customs, war risk) but never states the operation itself — the name 'list_news' implies listing, while the phrase 'Import and export headlines' reads as if the tool moves headlines around rather than returns them. An agent can infer the subject matter but not what action is performed.

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?

There is no statement of when to call this tool, no prerequisites, and no alternatives named. Since no sibling covers news, there is no routing risk, but the description gives the agent nothing to decide with beyond the topic labels.

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