CVE MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states what data sources are used and what information is returned (confidence score, country, ISP, etc.), which is helpful. However, it doesn't mention rate limits, authentication requirements, or potential costs/limitations of the free community services, leaving gaps in behavioral understanding.

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 appropriately sized and front-loaded: the first sentence states the core purpose and sources, the second lists return values, and the Args section clearly documents the parameter. Every sentence adds value, though the structure could be slightly more streamlined by integrating the Args into the main text.

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 moderate complexity (single parameter, no annotations, but with output schema), the description is reasonably complete. It covers purpose, sources, return values, and parameter details. Since an output schema exists, the description doesn't need to explain return values in depth. The main gap is lack of behavioral constraints like rate limits.

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 fully compensate. It provides clear parameter semantics: defines 'ip' as 'IPv4 or IPv6 address to check' with concrete examples (e.g., 1.2.3.4 or 2001:db8::1). This adds essential meaning beyond the schema's basic string type, ensuring the agent understands the expected format.

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 specific action ('Check an IP address reputation'), identifies the data sources ('via AbuseIPDB and GreyNoise Community'), and distinguishes this tool from siblings by focusing on IP reputation rather than vulnerabilities, hashes, or other security checks. It provides a verb+resource+scope combination that is unambiguous.

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 context (checking IP reputation from specific sources) but doesn't explicitly state when to use this tool versus alternatives like 'shodan_host_lookup' or 'passive_dns_lookup'. No exclusions or prerequisites are mentioned, leaving the agent to infer appropriate scenarios based on the tool's purpose.

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