Labs64/NetLicensing-MCP

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

No annotations are provided, so the description carries the full burden. It states it's a list operation, implying it's likely read-only and non-destructive, but doesn't explicitly confirm safety, permissions, rate limits, or response format. For a tool with zero annotation coverage, this leaves significant behavioral gaps, though the implied listing nature provides some basic 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, efficient sentence that front-loads the key information ('List all countries') and adds necessary context without waste. Every word earns its place, making it highly concise and well-structured for quick understanding.

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 the tool's simplicity (0 parameters, output schema exists, no annotations), the description is reasonably complete. It specifies the resource and context, and the output schema will handle return values. However, without annotations, it could benefit from more behavioral details (e.g., safety assurances), but for this low-complexity tool, it's largely adequate.

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 has 0 parameters, and schema description coverage is 100% (though empty). The description doesn't need to explain parameters, and it appropriately doesn't mention any. It adds value by specifying the purpose ('for VAT and localization settings'), which isn't in the schema. Baseline for 0 params is 4, and it meets that with clear added context.

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 the tool's purpose with a specific verb ('List') and resource ('countries'), and specifies the context ('available for VAT and localization settings'). It distinguishes from sibling tools by focusing on countries rather than licenses, products, or other entities. However, it doesn't explicitly differentiate from hypothetical similar country-listing tools, keeping it at 4 rather than 5.

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 usage context ('for VAT and localization settings'), suggesting when this tool might be relevant. However, it doesn't provide explicit guidance on when to use this versus alternatives, nor does it mention prerequisites or exclusions. The context is helpful but not comprehensive enough for a higher score.

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