Set Reverse DNS Record

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

Discloses key behavior: setting hostname to null deletes the record. With no annotations, the description carries full burden; it adequately covers the core nuance.

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 sentences, concise and front-loaded. First sentence states action, second adds crucial detail. No extraneous content.

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?

Adequate for a simple tool with 2 parameters. No output schema, and description omits return value information, which is a gap.

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. Description adds 'Set hostname to null to delete,' reinforcing delete behavior but not adding significant new meaning beyond schema.

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?

Clear verb ('Set or delete'), resource ('reverse DNS PTR record'), and scope ('for a given IPv4 address'). Distinguishes from sibling 'get_reverse_dns_record'.

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?

Explicitly states the two operations (set or delete) and implies context. No explicit when-not or alternative mention, but sibling separation is clear.

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