Rate time series over a range

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that granularity is daily and that the range is bounded by two dates, but says nothing about rate limits, data source, pagination, or whether end is inclusive.

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?

Three short sentences, front-loaded with the core behavior and finished with a concrete example. Nothing is padded, though the example repeats information the leading sentence already supplies.

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, and the description partly compensates by describing the result as a daily series of rates. Still missing boundary semantics for the date range and confirmation that the identifiers are ISO currency codes, which the four required params make important.

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% across four required params, so the description carries real weight. The example conveys date string format and that base/quote are currency identifiers, but it never says whether end is inclusive or whether codes must come from list_currencies.

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?

States a specific verb (Get) and resource (daily time series of rates) scoped to a date range and base/quote pair. The 'daily time series' framing distinguishes it from latest_rates and historical_rate, though it never names those siblings explicitly.

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?

'Useful for trends or charts' implies the use case but gives no when-not guidance and does not point to siblings like historical_rate for a single date or latest_rates for a current snapshot. Usage is inferable but not routed.

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