macro_euro_cpi_mom

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

The annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, and openWorldHint=true. The description adds the return type (pandas.Series), source URLs, and the data range, which provides some context beyond the annotations. However, it does not disclose any additional behavioral traits such as potential rate limits, update frequency, or specifics about the returned series.

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 concise and front-loaded with the essential information: the title, data range, source URLs, and return type. It is not overly verbose, though the title is repeated from the annotation and the docstring formatting could be cleaner. Overall, it earns its place without excessive detail.

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 zero-parameter read-only data retrieval tool, the description covers the data range, source URLs, and specifies the return type as pandas.Series. It does not detail the index or units, but the name 'CPI MOM' and the rtype provide sufficient context. Since there is no output schema, the description's inclusion of the return type is valuable.

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?

The tool has zero parameters and the input schema is empty, so the baseline is 4. The description correctly implies that no inputs are needed. With no parameters to document, the description does not need to add parameter semantics, and the schema coverage is trivially 100%.

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 identifies the tool as providing the Eurozone CPI month-over-month report, with a specific data range from 19900301 to present. The name itself distinguishes it from sibling tools like macro_euro_cpi_yoy, and the return type indicates it returns a data series. However, it lacks an explicit action verb such as 'get' or 'list', relying on the noun phrase and docstring.

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 gives no guidance on when to use this tool versus other macro indicators or CPI tools. It only states the data range and provides source URLs, with no mention of alternatives, exclusions, or specific scenarios where this tool is appropriate.

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