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

Annotations already cover the safety profile (readOnlyHint=true, non-destructive, closed-world), so the description's added value is the cost note ('Free') and the fact that each entry carries pricing and input summary — a real behavioral detail agents need before planning. It stops short of saying whether the catalog is static or whether entries are complete vs. truncated.

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?

Two short sentences, with the resource and the returned fields front-loaded before the pricing note. Every clause carries information; nothing is padding.

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, the description does the necessary work by naming the four fields each entry returns and confirming the call is free. Only minor gaps remain, such as ordering/size of the catalog, which are low-stakes for a no-parameter read.

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 tool takes zero parameters, so the schema has nothing to explain and the description has nothing to compensate for. Baseline 4 applies; no parameter semantics are needed or missing.

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?

States a specific verb and resource ('List all QuietProof audit rulepacks/SKUs') and enumerates the fields returned (price, endpoint path, description, input summary). It never names describe_rulepack, so the list-vs-detail boundary with that sibling is left implicit rather than stated.

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?

'List all' combined with the sibling name describe_rulepack implies this is the catalog/browse entry point and the sibling is for a single pack, but the description never says so or gives an exclusion. Usage is inferable rather than instructed.

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