get_daily_rates

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

There are no annotations, so the description carries the full disclosure burden. It usefully adds that no authorization is required and that the default date is today, but it does not describe the response format, error behavior, or handling of non-working dates.

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 one short, front-loaded sentence covering the essential facts: scope, date default, and authentication requirement. There is no filler or redundant 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 one-parameter, public data-retrieval tool, the description is nearly complete: it names the returned data, the main input, and the auth behavior. A more detailed description of the response payload would help, but it is not necessary for selecting and invoking the tool correctly.

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 only parameter, date, is already fully described in the schema with its pattern and default value. The description merely repeats the default and adds no new semantic information, so the baseline of 3 applies.

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 states a concrete resource — all Central Bank of Russia currency rates for a given date — and the word 'Все' (all) marks its scope, distinguishing it from single-rate siblings like get_currency_rate. It is not a tautology or vague restatement of the tool name.

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 makes it clear the tool is for getting the full daily rate table, but it never explicitly says when to choose this over sibling tools such as get_currency_rate or get_key_rate. The appropriate use case is implied by 'Все' rather than stated outright.

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