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

Beyond readOnlyHint and openWorldHint, the description discloses a large-response warning, pagination advice, pre-flattened response shape, SSL verification being disabled, exception behavior, and the POST endpoint mapping. These are substantive behavioral details an agent would not know from annotations alone.

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 front-loaded with the core purpose and the release-date-vs-reference-period distinction, then uses clear sections for warnings, response shape, and errors. It is somewhat long and repeats response information in both prose and a Returns block, but the length is justified by the tool's complexity.

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?

There is no output schema, but the description explains the return shape as a flat list of data-point dicts tagged with vectorId, productId, and coordinate. It also covers pagination, large responses, SSL behavior, and exceptions, leaving little ambiguity for correct 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 coverage is 60%: vectorIds, limit, and offset are documented in the schema, while the start and end release-date parameters are not. The description compensates by explaining that these are release-date bounds in YYYY-MM-DDTHH:MM format and by contrasting them with reference periods, though it does not add further detail for limit/offset beyond the schema.

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 uses a specific verb and resource: fetches bulk data for multiple vectors, filtered by release date range. It explicitly distinguishes this from reference-period filtering and names the sibling tool get_sdmx_vector_data, so an agent can identify its role without opening schemas.

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?

It gives explicit when-to-use guidance: use this for data released between date A and B, and use get_sdmx_vector_data for reference-period queries. It also states that get_sdmx_vector_data is more reliable for period filtering, which is a clear routing recommendation.

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