mcp2ws

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. The description reveals nothing about what the tool actually does - whether it retrieves flag images, validates flag data, returns flag information, or performs some other operation. It doesn't indicate if this is a read or write operation, what permissions might be needed, or what format the output takes.

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?

While technically concise (only 4 words), this is under-specification rather than effective conciseness. The description fails to convey essential information about the tool's purpose and usage. The single sentence doesn't earn its place by providing meaningful guidance to an AI agent.

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 1 parameter, no annotations, no output schema, and 0% schema description coverage, the description is completely inadequate. It provides no information about what the tool does, how to use it, what the parameter means, or what to expect as output. Given the complexity of distinguishing this from 19 sibling country-related tools, the description fails to provide the minimal necessary context.

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 description provides zero information about the single required parameter 'sCountryISOCode'. With 0% schema description coverage and no parameter documentation in the description, the agent has no understanding of what this parameter represents, what format it expects (2-letter ISO code? 3-letter?), or what values are valid. The description doesn't even mention that a parameter is required.

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 'SOAP method: CountryFlag' is tautological - it restates the tool name 'CountryFlag' with technical implementation details (SOAP method) rather than explaining what the tool does. It doesn't specify the verb (what action it performs) or the resource (what it operates on), nor does it distinguish this tool from its many siblings that also deal with country information.

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 provides absolutely no guidance about when to use this tool versus alternatives. With 19 sibling tools that all relate to country information (including CountryISOCode, CountryName, FullCountryInfo, etc.), the agent has no indication whether this tool retrieves, validates, generates, or processes country flags, or how it differs from related tools.

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