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

Annotations already declare readOnlyHint, idempotentHint and openWorldHint=false, so the safety profile is covered. The description adds nothing beyond this: it does not explain what 'basic' data is returned, whether pagination or rate limits apply, or any auth constraints.

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?

Compact and front-loaded: the purpose sentence comes first, then a short Args block. No wasted prose, though the parsed 'Args:' formatting is slightly mechanical rather than prose-integrated.

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 2-parameter lookup the description covers purpose and both params, but it omits what the 'basic' payload contains, how this tier differs from WW_advanced/WW_top, and (with no output schema) any indication of return shape. Adequate but with clear 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?

Schema description coverage is 0%, so the description must compensate, and it does: it documents vatCode as 'VAT code or company registration number' (a meaningful dual-acceptance note) and country_code as a two-letter code. Both required parameters gain real semantics beyond the bare string types.

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?

States a specific verb and resource ('Returns basic company information for a company worldwide'), so the agent knows the operation. However, it does not distinguish this 'start' tier from sibling tools get_company_WW_advanced and get_company_WW_top, which occupy the same namespace.

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?

No when-to-use guidance and no mention of alternatives. Given that three sibling tools (WW_start, WW_advanced, WW_top) appear to offer different depth tiers for the same resource, the absence of routing guidance is a real gap.

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