Seo Api2 MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It fails to describe any behavioral traits such as whether this is a read-only operation, if it requires authentication, rate limits, what data is returned, or potential errors. The description offers no insight beyond the basic action implied by the name.

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?

While concise with only three words, the description is under-specified rather than efficiently structured. It lacks front-loaded critical information and fails to convey essential details about the tool's purpose or usage, making it ineffective despite its brevity.

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 complexity of a domain lookup tool with no annotations and no output schema, the description is severely incomplete. It does not explain what Whois data is returned, how results are formatted, potential limitations, or error handling. This leaves significant gaps for an AI agent to understand and use the tool 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?

The input schema has 100% description coverage, with the single 'domain' parameter clearly documented. The description adds no additional semantic context about the parameter, such as format requirements (e.g., TLD inclusion) or examples beyond what the schema provides. With high schema coverage, the baseline score of 3 is appropriate as the description doesn't compensate but also doesn't detract.

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 'Whois Domain Lookup' is a tautology that essentially restates the tool name without adding meaningful context. It mentions the action ('lookup') and resource ('domain') but lacks specificity about what Whois data is retrieved or how it differs from similar tools like 'domain_age_checker' or 'whois_domain_lookup_deprecated'.

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. With multiple domain-related sibling tools (e.g., domain_age_checker, dns_records_checker, whois_domain_lookup_deprecated), there is no indication of when this specific Whois lookup is appropriate, what prerequisites might exist, or when other tools might be better suited.

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