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

With no annotations, the description carries full burden. It discloses that it returns a review-list screen, not confirmed acceptance, retains explicit dated source evidence when available, uses canonical WagerX links, and is not affiliate offers. It also explains precedence rules, providing comprehensive behavioral context.

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 a single dense sentence that front-loads the core purpose and packs multiple clarifications without waste. It is slightly long but every clause adds value, making it efficient and well-structured.

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 tool with no output schema, the description fully explains what it returns (at most one top choice and two alternatives) and the logic behind selection, including precedence and source caveats. It covers all essential aspects an agent needs to call and interpret results 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?

Schema coverage is 100%, so baseline is 3. The description does not add syntax or format details beyond the schema's 'Country name, ISO alpha-2 code or common alias'. It mentions 'country' but adds no extra meaning.

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 specific verb ('return') and resource ('top choice and two alternatives for a country'), and specifies the filtering logic (from completed scored reviews with restrictions). It clearly distinguishes from sibling tools like list_casinos and top_casinos by focusing on review-based recommendations with precedence rules.

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 clarifies what it is not ('not confirmed resident acceptance or local licensing') and notes precedence of pending states and explicit denials, but it does not explicitly name when to use this tool over siblings or provide alternatives for different scenarios. It gives context but not direct routing guidance.

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