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

With no annotations, the description carries the full behavioral burden, but it discloses none of the relevant traits: whether the transform is deterministic, how case/whitespace/unicode are handled, or what happens with empty input. It implies a pure transformation but adds no detail.

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?

A single, front-loaded sentence with zero waste. It is appropriately sized for the tool's simplicity.

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?

For a utility with no output schema and no annotations, the description says nothing about the resulting slug format (lowercasing, hyphenation, length limits, transliteration) or edge cases. An agent can guess but cannot be certain of behavior from the definition alone.

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 single 'text' parameter has 0% schema description coverage, and the description adds no meaning beyond the parameter name. While 'text' is largely self-explanatory in context, the description does not compensate for the schema gap as required at low coverage.

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 specific verb-plus-resource transformation ('Turn text into a URL slug'), which is clear and distinct from utility siblings like hash or uuid. It does not explicitly name an alternative, but the operation is unambiguous.

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 versus siblings such as hash or uuid, and no stated prerequisites or exclusions. Usage is only implied by the one-line purpose.

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