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

No annotations are provided, so the description carries full responsibility for behavioral disclosure. The only behavioral statement is 'No identifiers are retained,' which addresses privacy but not what the tool does with inputs, whether it is read-only, or what side effects occur. The core behavior (classification) is entirely unexplained.

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 short sentence, which is under-specified rather than concise. It omits critical information that the agent needs, so the brevity is not a strength. The privacy note is front-loaded but not the actual purpose.

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?

With four parameters, no output schema, and no annotations, the description is severely incomplete. An agent cannot determine what the tool does, what it returns, or how to use it correctly. The description fails to explain the classification concept or the role of each parameter, making the tool nearly unusable without external knowledge.

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 schema covers 100% of the four parameters, each with a description, so the baseline is 3. The description adds nothing about how these parameters relate to the classification or how they should be combined. It does not compensate for any gaps because there are none in the schema, but it also does not add value beyond the schema.

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 'Show how this request is classified' is vague. It does not specify what 'request' means, what kind of classification is performed, or what the output looks like. It also does not differentiate from sibling tools like normalize-url or validate-json, which handle specific inputs. The name 'compatibility' hints at a purpose, but the description itself is not clear.

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?

There is no guidance on when to use this tool versus its siblings. The description provides no context about scenarios, prerequisites, or alternatives. An agent would have no idea whether to pick this over cite, inspect-robots, or validate-json.

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