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

With no annotations, the description carries the full burden of behavioral disclosure. It implies a read-only scanning operation but does not mention side effects, permissions, rate limits, or return format. The sparsity leaves the agent unaware of potential network behavior or limitations.

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 compact and front-loaded, avoiding filler. However, it is more of a label than a full description; the brevity sacrifices necessary information, making it minimally adequate.

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?

Even though the tool is simple with one parameter and an output schema, the description does not explain what the parameter means or what the expected output represents. An agent cannot confidently call this tool correctly without additional inference.

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 lists a single 'q' parameter with a default value and no description, and schema description coverage is 0%. The description never addresses what 'q' should contain (presumably a URL), leaving the agent to guess the required input format.

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 action ('Enumerate <script> sources + detect JS libs/versions') on a clear resource (JS libraries). It communicates the tool's function well, though it doesn't explicitly mention the input target or distinguish itself from siblings like cdnjs or pageinfo.

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?

No guidance is provided on when to use this tool versus alternatives, what type of input is expected, or any context for invocation. The description is purely a capability statement and offers no exclusions or alternative routing.

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