Validate Fattura Semplificata Xsd

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

With no annotations, the description carries full behavioral burden. It discloses the lxml dependency, the specific validation aspects (namespace, element structure, data types, cardinality), and the exact return formats for success, failure, and setup errors. It's thorough for a validation tool, though it doesn't explicitly state there are no side effects (but validation is inherently read-only).

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 concise and well-structured: it opens with the core purpose, then usage guidance, dependency, validation scope, and return formats. Each sentence contributes meaning, with no fluff or redundancy.

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 a single parameter and an output schema, the description covers all essential context: what it validates, when to use it, the required dependency, and the three possible return structures. Nothing needed to call it correctly is missing.

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 input schema already covers the single parameter xml_string with 100% coverage, including the namespace requirement. The description adds no additional semantics beyond what the schema provides, so the baseline score of 3 is appropriate.

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 action ('Validate'), the specific resource ('FatturaSemplificata XML string'), and the exact schema version (VFSM10 XSD v1.0.2). This distinguishes it from sibling validation tools like validate_fattura_xsd, which targets standard invoices, and leaves no ambiguity about what the tool does.

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?

It explicitly instructs to 'Call this immediately after generate_fattura_semplificata()' and also mentions use for third-party simplified invoices. This gives precise timing and use cases, effectively guiding the agent on when to select this tool over alternatives.

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