create-me-dns-record

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

With annotations already declaring readOnlyHint=false and idempotentHint=false, the description adds important context: changes take effect on authoritative nameservers, and it's a mutating operation requiring user confirmation. No contradiction with annotations. Slightly less than 5 because it doesn't detail what happens if the record already exists or other edge cases.

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: first states purpose, second adds behavioral context. No fluff. Every sentence adds value.

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 complexity (nested object payload) and the fact that schema covers 100% of parameters, the description is nearly complete. It lacks details about return value or error states, but no output schema exists, so that burden falls on description. Slightly less than 5 because of missing outcome description.

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% (all parameters and nested properties have descriptions). The description adds minimal parameter semantics beyond the schema, but the schema already documents format and requirements thoroughly. 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?

Description clearly states 'Create a new DNS record on an owned domain', specifying the verb (create), resource (DNS record), and scope (on an owned domain). It distinguishes from sibling tools like 'delete-me-dns-record' and 'update-me-dns-record' by explicitly naming the operation type.

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?

Provides explicit guidance: 'Changes take effect on Muumuu's authoritative nameservers' and 'Mutating operation: confirm intent with the user before calling'. This tells the agent when to use (when user requests creating a DNS record) and when not to (requires user confirmation due to mutation). Alternatives are implied by sibling tool names.

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