website2vat

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

The description discloses that using this tool may cause a financial transaction only after user confirmation, which is critical behavioral information. Since no annotations are provided, this adds necessary transparency.

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 with two sentences that contain no fluff. Every phrase adds value.

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 simple tool with one parameter and no output schema, the description should clarify the parameter and the return value (a URL). It fails on both, leaving critical gaps.

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 does not explain the 'id' parameter at all, despite the schema having 0% description coverage. The agent is left to infer its meaning from the schema's pattern and examples, which is insufficient.

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 verb 'create' and the resource 'hosted Stripe Checkout URL' to unlock an owned lookup. It is specific and distinct from sibling tools which involve VAT lookups.

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?

There is no guidance on when to use this tool versus alternatives or when not to use it. The description implies it's for unlocking an owned lookup but does not explicitly exclude other contexts.

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

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

With no annotations, the description must fully disclose behavior. It states it 'Returns a free preview' and implies creation, but does not describe side effects, limits, or what 'quota' means. The behavioral contract is incomplete.

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 very short (two sentences) and front-loaded, but the brevity sacrifices necessary detail. It is under-specified, not concise in a helpful way.

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 no output schema, no annotations, and 0% parameter coverage, the description fails to provide sufficient context. It does not explain return values, quota behavior, or parameter requirements, making it inadequate for correct agent selection.

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 0%, so the description must explain parameters. The description does not mention 'name' or 'domains' at all, leaving their purpose and constraints entirely to the schema. This adds no value beyond the schema.

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 the verb 'Create' and the resource 'website-to-VAT lookup', clearly distinguishing from the sibling 'get_vat_lookup' which retrieves. However, the phrase 'website-to-VAT lookup' is somewhat vague and could be more specific about what the lookup entails.

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 mentions 'where quota is available', hinting at a usage constraint, but does not provide explicit when-to-use guidance or differentiate from alternatives like 'get_vat_lookup'. No prerequisites or exclusion cases are stated.

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

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

The description states it 'gets state and results', indicating a read-only operation. However, with no annotations, it lacks disclosure of behavioral traits such as caching, rate limits, or possible delays in state availability.

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 concise sentence that efficiently conveys the tool's purpose without extraneous words.

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 simplicity of the tool (one parameter, no output schema), the description adequately covers the core functionality. It could mention return format or status, but is not critically incomplete.

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 0% schema description coverage, the description adds no meaning to the 'id' parameter beyond what the schema's pattern and examples provide. It does not explain how to obtain the ID or its format implications.

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 retrieves the current state and results of a VAT lookup created by the client, using a specific verb (get) and resource (VAT lookup). It implicitly distinguishes from the sibling 'create_vat_lookup' which creates a lookup.

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 after creating a lookup via 'create_vat_lookup', but provides no explicit guidance on when to use or not use this tool, nor any prerequisites or alternative scenarios.

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