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

Annotations already declare readOnlyHint and openWorldHint, so safety profile is covered. The description adds a useful commercial detail ('affordable, pay-as-you-go'), hinting at per-call cost, but says nothing about throughput, per-domain pricing, what happens on unresolvable domains, or what the ICP-fit score is based on.

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 lead sentence is repeated verbatim, a clear defect that wastes half the text. The purpose is front-loaded correctly, but a third of the description is redundant duplication.

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?

No output schema and no description of return shape beyond a list of category names, no input format guidance for the single opaque nested parameter, and no sibling routing. For an open-world enrichment tool in a crowded family, this leaves too much for the agent to infer.

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?

Only one nested 'input' object whose schema description is just a documentation link; coverage is nominally 100% but content-free. The description's 'Turn domains into...' hints the input is a set of domains, adding mild value beyond the schema, but the shape/format of that input (single domain vs list, object keys) is never clarified.

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 set: turning domains into firmographics, contacts, socials and an ICP-fit score. An agent can tell this is a domain-based company enrichment tool. It does not, however, distinguish itself from close siblings such as b2b_crm_enricher, b2b_lead_list_builder or company_due_diligence.

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 guidance on when to choose this over the many neighbouring enrichment tools, and no prerequisites or exclusions. The only implied usage is 'you have domains', which is not stated explicitly nor tied to alternatives.

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