CVE 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. It mentions the return values (confidence level, IOC type, threat classification) but fails to disclose critical behavioral traits such as rate limits, authentication requirements, error handling, or data freshness. For a lookup tool with zero annotation coverage, this is a significant gap in transparency.

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 output, followed by a structured 'Args:' section that efficiently explains the parameter. Every sentence earns its place with no redundant information, making it easy to scan and understand quickly.

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 an output schema), the description is partially complete. It covers the purpose and parameter semantics well, and the output schema likely handles return values, but it lacks behavioral context (e.g., rate limits, errors) and explicit usage guidelines versus siblings, leaving room for improvement in overall completeness.

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 fully. It provides detailed semantics for the single parameter 'ioc', explaining it as an 'Indicator of Compromise' and listing valid types (IP address, domain, URL, MD5/SHA256 hash). This adds substantial meaning beyond the bare schema, effectively documenting the parameter's purpose and 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 ('Look up an IOC against ThreatFox') and resource ('malware family attribution'), distinguishing it from siblings like 'check_ip_reputation' or 'lookup_file_hash' by specifying its unique focus on malware family attribution via ThreatFox. It explicitly lists the IOC types (IP, domain, URL, hash) to clarify scope.

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 by stating it's for 'malware family attribution' against ThreatFox, which differentiates it from tools like 'check_kev' or 'get_domain_intel'. However, it lacks explicit guidance on when to use this tool versus alternatives (e.g., no mention of when to choose 'lookup_file_hash' for hash checks or 'check_ip_reputation' for IP assessments), leaving some ambiguity.

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