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

With no annotations, the description carries the full burden and does well: it discloses that system records (SOA/NS/DS/DNSSEC) are silently skipped, that capacity/conflict warnings are reported per line, that the batch is NOT aborted on failure, and that the call is mutating. Gaps remain on permissions required, whether existing records are replaced or merged, and idempotency.

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?

Three short clauses, front-loaded with the operation and format, no filler. Slightly telegraphic in style but nothing wasted.

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 mutating, 0%-schema-coverage tool with no annotations and no output schema, the description covers the unusual behaviors well (skips, non-aborting warnings, mutating flag) but omits auth requirements, what happens to pre-existing records, and how warnings are surfaced to the caller.

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 0%, so the description must compensate; it does add the file format and the 256 KB limit for the zone-file parameter, but zoneId is never explained, and the schema's required list names 'text' while the properties define 'zoneFile', an inconsistency the description does not resolve.

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 specific verb+resource combination ('Bulk-import records'), the input format (RFC 1035 zone file) and the size ceiling, which cleanly distinguishes it from the single-record sibling dns_record_create.

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 word 'Bulk-import' implies this is the many-record path versus dns_record_create, but the description never names an alternative or states a when-not condition, leaving the agent to infer routing from the large sibling set.

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