numbeo_indices_rankings_by_country

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

No annotations are provided, so the description carries the full burden. It mentions 'Credential-free' as a behavioral trait, but does not disclose error handling, rate limits, return format, or behavior for invalid inputs. For a tool with no output schema, more detail is needed.

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?

The description is two sentences, but the first and second sentences are nearly identical ('Get...' vs 'Returns...'). The 'Credential-free' note is useful but could be integrated. Some redundancy reduces conciseness.

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?

Given the absence of an output schema and the presence of many siblings, the description adequately states the tool's scope (global country-level) and data source, but lacks examples, details on ranking structure, or guidance on how this tool fits with other numbeo indices tools.

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?

Although schema description coverage is 100%, the schema's parameter description ('Index family') is minimal and no enum or examples are provided. The tool description does not add any additional meaning or permissible values, leaving the agent uncertain about valid input.

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 clearly states the action ('Get') and the resource ('global Numbeo country ranking for an index family'). It explicitly distinguishes this tool from siblings by specifying it provides global country-level rankings, differentiating it from city-level or specific cost-of-living indices.

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 usage when a global country ranking for a Numbeo index is needed, but it does not provide explicit guidance on when to avoid this tool or mention alternatives among the many numbeo siblings. No when-not conditions are stated.

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