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

The annotation destructiveHint=true indicates this operation is destructive, but the description's 'Create' implies a non-destructive addition. This contradicts the annotation. No additional behavioral details (e.g., replacement semantics, required permissions) are provided.

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?

While brief, the description includes a contradictory phrase that adds ambiguity rather than clarity. A useful description would be a single clear statement; this one wastes space with misleading information.

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?

With five parameters, a nested body, and no output schema, the description is far too sparse. It fails to explain the record types supported, required fields, or the effect of the operation, making it insufficient for correct invocation.

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?

The description contains no parameter explanations. The schema has 0% description coverage for top-level parameters, and the description does not clarify recordId, zoneName, or the body structure, leaving the agent without necessary context.

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 reads 'Update DNS zone record - Create resource record in a zone', directly contradicting the tool's name by using 'Create' instead of 'Update'. This misstates the operation and fails to distinguish it from the sibling tool createDnsZoneRecord. It is misleading rather than clear.

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?

No usage context is provided; the tool does not mention when to use it versus createDnsZoneRecord or deleteDnsZoneRecord. The phrase 'Create resource record' actively misleads an agent toward using it for creation instead of modification.

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