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

Annotations already declare readOnlyHint, openWorldHint, and destructiveHint=false. The description adds useful context by naming the returned fields and noting the API endpoint, which helps the agent understand the response scope. It does not discuss rate limits or error behavior, but for a simple read-only lookup the added detail is reasonable.

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 front-loaded sentence naming the resource and returned fields, followed by the endpoint. Every element contributes without wasted text.

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 zero-parameter, read-only tool with no output schema, the description supplies the essential returned fields and scoping context. No additional parameter or safety details are needed beyond the annotations.

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?

There are zero parameters, so the baseline is 4. The schema is empty and fully covered, and the description correctly requires no parameter input.

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 clearly identifies the resource (WaiverFile site / WaiverSite) and the data returned (name, settings, plan information). It is specific enough to distinguish this tool from the sibling waiver and event tools, though it does not explicitly call out sibling differentiation.

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 context 'this API key belongs to' implies authentication scope and suggests when the tool applies, but there is no explicit guidance on when to use it versus alternatives. Since no sibling overlaps, the implied usage is sufficient for a minimum viable score.

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