numbeo_cost_of_living_city

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

With no annotations, the description carries the burden. It notes 'Credential-free public Numbeo data' but lacks details on data freshness, rate limits, or the format of the slug. Minimal behavioral context beyond obvious read-only nature.

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, front-loaded with action. Every sentence is essential and concise. No wasted words.

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 no output schema, the description provides a good overview of return content (itemized prices grouped by category). It lists example categories. Almost complete for a simple tool, though exact structure is not detailed.

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 100% with 'slug' described. The description adds no extra meaning about slug format or how to construct it (e.g., city name conventions). Baseline 3 is appropriate as schema does the heavy lifting.

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 'Get a Numbeo city's cost-of-living prices' with a specific verb and resource. It distinguishes from siblings like numbeo_cost_of_living_country by explicitly focusing on a single city and mentioning itemized categories.

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 use for a single city's detailed prices but does not explicitly state when to use versus siblings (e.g., country-level or rankings). No 'when-not' or alternative guidance is provided.

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