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

The description adds the cost ($0.02 USDC per call), which is genuine behavioral context the annotations do not carry. Beyond that it says nothing about data freshness, source, coverage, or the fact that country is optional and what happens when it is omitted. The annotations themselves (readOnlyHint=false, idempotentHint=true) are unusual for a snapshot-style read tool and are not explained by the text.

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 line, front-loaded with the resource and its contents, then the price. Nothing is padded. The hyphenated fragment style is terse but readable.

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 a paid call, an optional undocumented parameter, no output schema, and no annotations explaining cost or data scope, the description is too thin. It should state what happens without `country`, the currency/units of the indicators, and whether the data is live or cached.

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 0% and the single `country` parameter has no description in either the schema or the tool text. The description never mentions what format country takes (ISO code, name, default/global), so the only parameter the agent must reason about is undocumented.

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 (macro/economic snapshot) and enumerates its contents (GDP, inflation, rates), so an agent can tell it apart from crypto-price, defi-yields, or news-feed. It lacks an explicit verb (get/fetch), but the noun phrase is specific enough to identify the operation.

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?

No when-to-use, when-not-to-use, or alternative routing is given. The sibling list contains several finance-adjacent tools (crypto-price, defi-yields, news-feed), and the definition never says which one to pick for which question, leaving the agent to infer.

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