compare_vintages

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

With no annotations provided, the description carries the burden of disclosing behavior. It usefully explains the output structure: 'revisions' lists changed periods with the two vintages, and 'no_data' lists vintages missing the key. It does not disclose any side effects, auth requirements, or rate limits, but the tool appears to be a read operation.

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 short and front-loaded, with the core purpose stated first and the key output behaviors following. Every sentence contributes meaning, and there is no filler or repetition.

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 six parameters, no output schema, no annotations, and sibling tools with overlapping concerns, the description is not complete enough. It explains the response's revisions and no_data fields but leaves parameter usage, date filtering, limit behavior, and comparison with fetch_data or list_vintages unexplained.

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 description does not explain the six parameters beyond implying that 'key' is central to the comparison. Provider, flow, start, end, and limit semantics are left entirely to the schema, which lacks descriptions. This is a significant gap that the description does not compensate for.

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 that this tool reads one key across several vintages and describes the revisions between them. It conveys a specific operation and resource, though it could more explicitly differentiate itself from sibling tools like list_vintages or fetch_data.

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 the tool is for comparing values of a key across vintages, which gives a sense of when it applies. However, it provides no explicit guidance about when to prefer this over fetch_data or list_vintages, nor does it mention exclusions or alternatives.

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