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

Annotations already declare destructiveHint=true, idempotentHint=false, and openWorldHint=true, so the safety profile is largely covered by structured data. The description adds useful behavioral context about resolving a complete hostname against the authenticated customer's longest matching parent domain, but it does not explicitly state whether an existing A record is overwritten or what permissions are required.

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 a compact paragraph that front-loads the core operation and then explains the record_name conventions. The hostname-compatibility sentence is longer but earns its place by resolving a real ambiguity in the domain parameter; there is little wasted text.

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 presence of an output schema and rich annotations, the description need not explain return values or repeat safety hints. However, for a destructive DNS mutation with 0% schema coverage, it remains incomplete: it does not describe record_value, does not clarify overwrite behavior, and does not route the agent away from add_dns_record or update_dns_record.

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 for undocumented parameters. It does a good job explaining record_name semantics for root and subdomain records and clarifies that domain may accept a full hostname, but it says nothing about record_value, leaving one required parameter's meaning entirely to the bare schema.

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 states a specific verb and resource: configuring an A record for a domain through AIvikings. It is clear what the tool does, but it does not distinguish this operation from siblings like add_dns_record or update_dns_record, leaving ambiguity about whether it creates, replaces, or updates a record.

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 explains how to use record_name for root and subdomain records, but it gives no guidance on when to choose this tool over add_dns_record, update_dns_record, or other DNS-related siblings. It lacks any explicit when-to-use, when-not-to-use, or alternative-selection guidance.

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