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

Annotations already establish readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description usefully adds a hard operational constraint ('PAID ONLY: 5 prepaid credits; production billing required') that the annotations do not convey, but says nothing about what the resulting score represents, its range, or how it is computed — meaningful gaps for a scoring tool with no output schema.

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 core action front-loaded and the billing constraint second; nothing is padded. The billing detail is capped mid-sentence but remains legible, so structure holds up well.

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 three-boolean, no-output-schema scoring tool, the definition covers the action and its cost gate but omits what the returned score looks like and how the three flags combine. An agent can invoke it, but cannot set expectations about the result or explain outcome semantics to a user.

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?

All three parameters (has_security_review, handles_sensitive_data, has_incident_plan) have 0% schema description coverage, so the description must compensate and does not. The phrase 'security attestation and service risk indicators' only loosely gestures at the boolean inputs without defining any of them or explaining how a false value is interpreted.

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 gives a specific verb and resource ('Score a vendor') plus the input class ('security attestation and service risk indicators'), so an agent can tell this is a vendor-risk scoring tool. It does not contrast itself with any sibling (e.g., privi_pro_retry_risk or privi_prompt_risk), but the domain is distinct enough from the name alone to identify the operation.

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 when-to-use, when-not-to-use, or alternative-routing guidance is provided. The only condition mentioned is a billing prerequisite ('production billing required'), which is an eligibility gate rather than usage guidance, leaving the agent to infer the intake scenario from the title alone.

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