check_root_server_set

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

Annotations already declare readOnly, idempotent, openWorld, and non-destructive, so safety is covered. The description adds real behavioral context beyond that: it samples exactly 3 rotating root servers per call and depends on the BV_INFRA_PROBE environment, degrading to embedded hints as reference-only data when absent.

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?

Two dense sentences with no filler, and the core behavior is front-loaded before the environment caveat. Slightly jargon-heavy but every clause contributes.

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?

An output schema exists, so return values need no exposition. The description covers what is compared, the sampling behavior, and the environment dependency, leaving little an agent needs in order to call it correctly.

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?

With a single, fully-described enum parameter (format), the schema already carries the semantics. The description adds nothing about the format options, so the baseline 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?

States a specific verb (Query/compare) and resource (root servers, priming NS set, glue, SOA serials, cross-root consistency) with the scope of the operation. An agent can tell this inspects the root server set rather than a general domain, though it does not explicitly distinguish itself from neighbors like check_ns or check_resolver_consistency.

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?

There is no explicit when-to-use vs alternatives guidance. The BV_INFRA_PROBE sentence implies a prerequisite and a degraded mode, which is useful but not framed as usage direction, so the guidance remains implicit.

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