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

Annotations only provide destructiveHint, so the description carries weight and it delivers the key impact disclosure: 'Takes effect on live DNS,' plus the underlying API route. It does not cover idempotency, duplicate handling, or auth needs.

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 short sentences, front-loaded with the WRITE marker and purpose, then impact, then the API route. No wasted words.

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 14-param mutation tool with a fully documented schema and no output schema, but with thin annotations it could say more about what happens on conflict, whether records are appended or overwritten, and the return behavior.

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 100% across 14 well-documented params, so the schema already does the heavy lifting. The description adds no param detail and correctly does not need to.

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 ('Add a record to a DNS zone') and flags it as a WRITE operation. It does not explicitly distinguish itself from the sibling bunny_update_dns_record, though 'Add' vs 'update' is inferable.

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 context that it applies to live DNS implies when it matters, but there is no explicit when-to-use or when-to-prefer-update guidance, and no prerequisite or permission requirements are stated.

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