check_ip

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

No annotations are provided, so the description carries full responsibility for transparency. It thoroughly explains the tool's behavior: real-time DNS lookups, DNSBL checks, Tor-exit status, abuse score calculation, and the effect of the deep parameter. It also notes that domains are resolved to their A record.

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 paragraph but is well-organized and front-loaded with the main purpose. It uses clear language and avoids redundancy. Breaking into bullet points could improve readability, but it remains concise and effective.

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?

Given the tool has only 2 parameters, no output schema, and no nested objects, the description is remarkably complete. It explains both parameters, the entire output (including verdict levels like CLEAN, LOW_RISK, etc.), and the tool's mechanism. No critical information is missing.

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 100%, so baseline is 3. The description adds value by explaining that domains are resolved to IPs, and that deep=true queries additional DNSBL zones and fetches TXT listing reasons. This goes beyond the schema descriptions.

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 states the tool performs a live network and abuse reputation check on an IP or domain. It lists specific lookups (DNS, DNSBL, reverse-DNS) and return values (geolocation, ASN, BGP prefix, etc.). The purpose is distinct from the sibling tool check_many, which suggests batch operations.

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 description provides clear use cases: vetting inbound traffic, validating signups, moderating user-supplied IPs/domains. It does not explicitly state when not to use it or mention alternatives, but the context is sufficient for an agent to decide.

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