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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It only states 'No identifiers are retained,' which is a privacy note, but it fails to disclose whether the tool is read-only, what happens to the inputs (e.g., whether they are modified or discarded), whether authentication is needed, or what the response format looks like. This is a significant gap for a tool with no annotations.

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 sentence with no wasted words, which is efficient. However, it is under-specified—it provides only a vague purpose and a privacy note, missing critical information. It is concise but not appropriately sized for the tool's complexity, so a middle score is warranted.

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?

The tool has no output schema, no annotations, and four optional parameters. The description fails to explain what the classification output looks like, how to interpret results, or how the parameters relate to the classification. This is grossly inadequate for an agent to correctly invoke and interpret the tool's response.

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%, as each of the four parameters (url, host, json, zone) has a description in the schema. The tool description adds no additional meaning beyond the schema, but since the schema already documents the parameters, the baseline score of 3 is appropriate.

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 states a verb ('Show') and an object ('how this request is classified'), but the purpose is vague. It does not specify what kind of classification is performed, what 'request' refers to, or how it relates to the tool's name 'compatibility'. There is no differentiation from sibling tools like validate-json or normalize-url, leaving the agent unsure of its exact function.

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 offers no guidance on when to use this tool versus alternatives. There is no mention of conditions, exclusions, or which sibling tools might be more appropriate for specific scenarios. The single sentence provides no context for selection.

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