Add records to an RRSet

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

With no annotations, the description carries the burden of disclosing mutating behavior. It honestly conveys that this adds to existing records and can create the RRSet, which is valuable. However, it does not mention potential duplicate handling, validation failures, or any other side effects, leaving some behavioral gaps for a mutation tool.

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 deliver the essential semantics without filler. The first sentence names the action and resource; the second adds the two most important behavioral nuances. Every word earns its place.

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 straightforward add operation, the description covers the main context: append semantics and creation behavior. It does not explain return values or error conditions, but with no output schema and a well-described parameter set, the core intent is sufficiently complete for an agent to select and invoke it correctly.

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 high at 80%, and the schema already documents each parameter with examples. The tool description adds no parameter-level information, so it neither improves nor harms the schema's meaning; baseline 3 is appropriate.

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 states a specific action ('Add records to an RRSet') and immediately clarifies the two key behavioral distinctions: existing records are preserved and the RRSet is created if absent. This clearly differentiates it from sibling tools like set_records or remove_records.

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 gives clear context for when to use this tool: when you want to append records while keeping existing ones, and when the RRSet may not yet exist. It does not explicitly name alternatives, but the behavioral guidance strongly implies the contrast with replace-style tools like set_records.

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