Update DNS records

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

The description discloses important destructive behavior by explaining that overwrite=true replaces existing records, which complements the destructiveHint=true annotation. It also notes the merge behavior when overwrite is not set. This adds specific mechanistic detail beyond what readOnlyHint/idempotentHint/destructiveHint convey.

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 core behavior explanation is concise and front-loaded, but the first sentence duplicates the title and the final 'Use this endpoint...' sentence adds no new information. The middle two sentences carry the actual content, so the description could be trimmed without loss.

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 mutation tool with rich annotations and a fully described schema, the description provides the key behavioral distinction (overwrite vs merge). It doesn't cover usage alternatives or return values, but no output schema exists to require the latter; given annotations, this is a reasonably complete 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?

All parameters are fully described in the input schema (100% coverage), so the description needs to add little. It does reiterate the meaning of overwrite, but the schema already contains the same semantics, so the added value is marginal.

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 clear action ('Update') and resource ('DNS records for the selected domain'), making it distinct from siblings like DNS_getDNSRecordsV1 and DNS_deleteDNSRecordsV1 by verb alone. It doesn't explicitly call out the distinction from DNS_resetDNSRecordsV1, but the update intent is unambiguous.

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 does not discuss when to use this endpoint versus alternatives such as DNS_resetDNSRecordsV1 or DNS_deleteDNSRecordsV1. The only usage-like sentence, 'Use this endpoint to modify domain DNS configuration,' restates purpose rather than giving selection criteria or exclusions.

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