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

The description and parameter notes disclose that identifiers are not retained and that values are 'discarded' or checked without side effects, which is useful. However, they do not explain what the tool actually does with the supplied values, what it returns, or what side effects, if any, occur beyond retention.

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 and the parameter notes are compact, so there is no verbose or redundant filler. It is concise, though the brevity comes at the cost of clarity.

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 no output schema, no required parameters, and nine heterogeneous optional inputs, the description gives an agent almost no idea of what request to construct or what result to expect. It is not complete enough for reliable tool selection or invocation.

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?

All nine parameters have schema descriptions, many with useful hints such as 'JSON text to validate' or 'IANA timezone name', so coverage is complete. The descriptions still do not tie the parameters to a coherent purpose, and several notes like 'discarded after the length check' explain lifecycle rather than meaning.

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 says 'Show how this request is classified' but does not define what classification means, what categories exist, or what input is being classified. The tool name 'compatibility' hints at a purpose, but the description alone leaves the core function ambiguous.

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 about when to use this tool or when to prefer any of the sibling tools such as normalize-url, validate-json, or weather-hint. The description only states a privacy property, not a usage context.

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