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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive, so the safety profile is fully covered structurally. The description adds that this is a terms/conditions reference scoped to Russia residents, which is useful framing, but it says nothing beyond that — no staleness/refresh caveat for pricing data, which would be genuinely valuable for a fees lookup.

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?

A single dense sentence with no filler; the product, audience, and content scope are front-loaded. Every clause earns its place by telling the agent what the returned terms cover.

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?

With no parameters and no output schema, the description compensates reasonably by enumerating the topics the terms cover (price, fees, top-up, requirements, caveats), giving the agent a sense of the payload. It falls short of describing the return structure or format, but for a static reference lookup that gap is minor.

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 takes zero parameters, so per the rubric the baseline is 4. There are no arguments whose meaning could be clarified or obscured, and the description correctly implies a parameterless retrieval.

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 resource — the terms of the Omega Wallet virtual Visa card for Russia residents — and enumerates what the terms cover (price, fees, top-up, requirements, caveats). This is clearly a static informational lookup rather than an action. It differentiates somewhat from siblings like travel_card_for_country by naming the exact product, though it does not explicitly contrast with it.

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?

There is no explicit when-to-use or when-not-to-use statement, nor any mention of alternatives such as travel_card_for_country or how_to_pay_from_russia. Usage is implied by the enumerated content topics: an agent can infer to call this when a user asks about this card's price, fees, or top-up options.

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