Create RRSet

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

With no annotations, the description covers key behavioral traits: it's a create operation that fails on duplicate name/type, and it does not overwrite. This is valuable beyond the schema. It doesn't mention permissions or success return, but the failure behavior is well disclosed.

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 two sentences long, front-loaded with the purpose, and includes a useful example and failure condition. No redundant or filler 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?

Given the comprehensive schema and no output schema, the description sufficiently explains the tool's purpose and critical failure mode. It also clarifies how to proceed when the RRSet already exists. Minor gaps remain (e.g., success output), but overall it's well-rounded.

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 high (83%), and each parameter already has a description. The tool description adds minimal parameter context, only using the example 'A record for "www"' to illustrate name and type usage. It does not go beyond the schema, so 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 clearly states the action ('Create a new RRSet'), the resource ('in a zone'), and gives a concrete example ('an A record for "www"'). It also distinguishes itself from siblings by noting it fails if the RRSet already exists and pointing to set_records/add_records as alternatives.

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 explicitly provides when-not-to-use context: if an RRSet with the same name and type already exists, use set_records or add_records instead. This offers clear guidance on when to choose this tool over alternatives.

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