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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered structurally. The description adds genuinely useful non-schema context: it is paid-only, costs 5 prepaid credits, and requires production billing. It does not disclose what the evaluation returns (pass/fail? per-check results?) or whether a failing gate blocks anything.

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 tight sentences with the action front-loaded and the billing constraint immediately after. Nothing is redundant, though the brevity is partly a symptom of under-specification rather than efficient economy.

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?

This is a nested-object input with zero property documentation and no output schema, and the description does not fill either gap. For a release gate, an agent needs to know what a `checks` object contains and what the evaluation result means; neither is provided.

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 coverage is 0% and the single `checks` parameter is an untyped object with no defined properties, so the schema offers essentially nothing. The description only says "explicitly supplied release controls," which gives no shape, keys, or expected values for the nested payload — leaving the caller to guess the most important part of the call.

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: "Evaluate explicitly supplied release controls before a production release." An agent knows it is a gate check on supplied controls, though it never distinguishes itself from near neighbors like privi_pro_approval_gate or privi_pro_deployment_canary.

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?

"before a production release" implies the timing and context of use, and "explicitly supplied" hints that inputs come from the caller rather than being fetched. However, there is no explicit when-not guidance, no named alternative, and no prerequisites beyond the billing note.

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