Seo Api2 MCP Server

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

No annotations are provided, so the description must fully disclose behavioral traits. 'Name Servers Checker' offers no information on what the tool does operationally—whether it's a read-only lookup, requires authentication, has rate limits, returns structured data, or handles errors. This leaves the agent guessing about the tool's behavior and safety.

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 just two words, the description is under-specified rather than efficiently informative. It lacks front-loaded essential details like the tool's action or purpose, failing to use its brevity to convey useful information, which compromises its effectiveness.

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 tool's likely complexity (checking name servers involves DNS queries), no annotations, no output schema, and a minimal description, this is highly incomplete. The agent cannot infer what the tool returns, how it behaves, or when to use it, making the description inadequate for effective tool invocation.

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 100%, with the 'domain' parameter clearly documented in the input schema. The description adds no additional meaning beyond the schema, such as domain format constraints or examples. However, with high schema coverage and only one parameter, the baseline score of 3 is appropriate as the schema adequately handles parameter documentation.

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 'Name Servers Checker' is a tautology that merely restates the tool name without specifying what action it performs. It doesn't indicate whether it retrieves, validates, analyzes, or compares name servers, nor does it differentiate from sibling tools like 'dns_records_checker' or 'whois_domain_lookup' that might handle related DNS functionality.

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 is provided on when to use this tool versus alternatives. With sibling tools like 'dns_records_checker' and 'whois_domain_lookup' available, the description fails to specify scenarios, prerequisites, or exclusions for this tool's application, leaving the agent without context for selection.

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