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 information is returned (IP address, geographic location, ASN, historical malicious behavior) but doesn't describe other important behavioral traits: whether this is a read-only operation, rate limits, authentication requirements, error conditions, or response format. For a tool with zero annotation coverage, this leaves significant gaps in understanding how the tool behaves.

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 a single, efficient sentence that clearly states the tool's purpose and what information it returns. It's appropriately front-loaded with the core functionality. While very concise, it could potentially benefit from slightly more detail given the complete lack of annotations and output schema.

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 threat intelligence queries and the complete lack of annotations (0% coverage) and no output schema, the description is insufficiently complete. It mentions what information is returned but doesn't describe the response structure, error handling, rate limits, or authentication requirements. For a tool that presumably queries external threat intelligence data, more context about behavioral expectations is needed.

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 1 parameter with 0% description coverage (no schema descriptions). The tool description doesn't mention the 'ip' parameter at all, providing no additional semantic information beyond what's in the bare schema. However, with only one simple parameter, the baseline is appropriately 3 - the description doesn't add value but the simplicity of the schema means this isn't critically problematic.

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 tool's purpose: '获取给定 IP 的威胁情报信息' (get threat intelligence information for a given IP). It specifies the verb ('获取' - get/retrieve) and resource ('IP 的威胁情报信息' - IP threat intelligence information). However, since there are no sibling tools mentioned, it cannot demonstrate differentiation from alternatives, preventing a perfect score of 5.

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 '基于长亭威胁情报' (based on Changting threat intelligence), suggesting this tool is specifically for querying that intelligence source. However, it provides no explicit guidance on when to use this tool versus alternatives (e.g., other IP lookup services), nor does it mention any prerequisites or exclusions. The guidance is implied rather than explicit.

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