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

Substantially exceeds the annotations, which only say read-only/open-world/non-idempotent. The description discloses the metered cost against the IPDetective allowance, the confirm gate, duplicate collapsing before submission, and the absence of retries or background polling — all behavior an agent cannot derive from the structured fields.

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?

Three tightly scoped sentences, front-loaded with the operation, then the cost gate, then the failure-recovery rule. No filler or restated field names.

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?

There is no output schema, so the description is the only place an agent could learn what a batch lookup returns, and it says nothing about response shape or partial-failure handling. Combined with the undocumented include_info flag, the definition is workable but leaves a notable gap for a metered batch call.

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 0%, so the description carries the full burden. It explains the ips bound (1–100, public) and the confirm gate, but include_info — defaulting to true, a semantically loaded flag — is never mentioned anywhere, leaving one of three parameters opaque.

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?

Specific verb and resource ("Look up 1–100 public IP addresses in one vendor request") with an explicit cardinality bound that implicitly separates it from the single-IP sibling. It never names ipdetective_lookup_ip as the per-IP alternative, so the differentiation is inferred from the bound 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?

Gives a real precondition (confirm:true required) and an operational rule (check usage before resubmitting after an error), which nudges the agent toward ipdetective_account_usage. It stops short of an explicit use-this-not-that statement against the single-lookup sibling.

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