IT Tools MCP Server

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

Annotations provide readOnlyHint=false (implying mutation), but the description doesn't clarify what 'parse' entails or what the output looks like. The description adds the dual functionality of validation AND parsing beyond what annotations indicate, but doesn't explain behavioral aspects like error handling, format requirements, or what parsing produces.

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 extremely concise (7 words) and front-loaded with all necessary information. Every word earns its place, with no wasted text or unnecessary elaboration.

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 single-parameter validation tool with good schema coverage but no output schema, the description adequately covers the basic purpose. However, it lacks details about what validation entails, what parsing produces, or error conditions that would help an agent use it effectively.

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?

With 100% schema description coverage, the input schema already fully documents the single 'iban' parameter. The description mentions validation and parsing but doesn't add any parameter-specific details beyond what the schema provides, such as expected IBAN formats or validation criteria.

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 specific verbs ('validate and parse') and the resource ('IBAN'), making it immediately understandable. However, it doesn't explicitly differentiate from sibling tools, though most siblings are unrelated conversion/formatting tools rather than validation tools.

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 no guidance on when to use this tool versus alternatives. While there are no direct IBAN validation siblings, there's no mention of prerequisites, typical use cases, or limitations that would help an agent decide when this is the appropriate tool.

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