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

Beyond the annotations (readOnly, openWorld, idempotent, non-destructive), the description adds valuable behavioral context: the collector does not execute JavaScript, results are based on served HTML and fetched responses, and the inventory is complete rather than sampled. This meaningfully clarifies the tool's limitations and output fidelity.

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 three well-structured sentences: a precise statement of what it returns, an important caveat about JavaScript, and concrete use cases. No sentence is wasted, and the most important information is front-loaded.

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?

Given an output schema is present and annotations already cover safety and world-openness, the description provides the remaining essential context: the exact inventory categories, the non-JavaScript limitation, and typical use cases. It is complete for an agent to select and call this tool appropriately.

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%, so the baseline is 3. The description does not add parameter-level detail beyond the schema, though it does reinforce the meaning of 'inventory' and the completeness guarantee. This is adequate but not exceptional.

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 opens with a specific verb and resource: 'Return a complete inventory of what the Outrings collector observed on a page.' It enumerates the exact kinds of inventory items, which directly maps to the inventory enum and clearly distinguishes this from a sample or aggregate view.

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 explicitly gives intended use cases with quotes ('what third-party scripts am I loading', 'which email addresses are exposed on my site', etc.). It also usefully cautions that JavaScript is not executed, implying it should not be used for runtime-loaded resources, though it does not name alternative tools.

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