DNS_getDNSSnapshotV1

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

With no annotations, the description carries the full burden for behavioral disclosure. It describes the tool as retrieving/viewing data, which implies a read-only and non-destructive operation, but does not mention idempotency, authentication, rate limits, or response details. This is adequate but lacks depth.

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 very concise: two sentences, first stating the action, second providing usage context. No redundant or extraneous information. Front-loaded and efficient.

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 tool's low complexity (2 required parameters, no output schema, no annotations), the description covers the essential purpose and usage context. It mentions the contents (DNS zone records) and historical nature, providing a clear picture. Could be slightly more complete by noting response format, but mostly sufficient.

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 coverage is 100% (both parameters have descriptions). The description adds no additional meaning beyond the schema; it merely implies the snapshotId identifies the particular snapshot and domain is needed. Thus, baseline score of 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?

The description clearly states the tool retrieves a specific DNS snapshot with its zone record contents, using the verb 'retrieve' and specifying the resource. It distinguishes itself from sibling tools like DNS_getDNSSnapshotListV1 (lists snapshots) and DNS_restoreDNSSnapshotV1 (restores snapshots) by focusing on viewing a particular snapshot with contents.

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 explicitly states to 'view historical DNS configurations for domains,' guiding usage toward historical data rather than current records. However, it does not explicitly exclude alternatives or mention when not to use this tool, such as comparing to DNS_getDNSRecordsV1 for current records.

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