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

Annotations already declare this a destructive, idempotent write, but the description adds real behavioral context beyond them: it requires an account session, X-Organization-Id, and CSRF for writes, explains that maintenance pauses notices while collection continues, notes HTTP gets DNS checks only, and instructs verifying enabled/no-suspension/next_check_at after saving.

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?

It is front-loaded with the auth prerequisite, which is good, but several fragments ('Add only the tab's origin', 'HTTP receives DNS checks only') are dense and hard to parse without prior context, and the seven short sentences read as telegraphic rather than well-structured prose.

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 destructive mutation with no output schema, it covers auth requirements, mode semantics, and even a post-save verification checklist, so an agent has almost everything needed. The remaining gap is the lack of explicit routing to sibling tools for related DNS or alert configuration.

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 100%, so the schema already documents id, revision, enabled and maintenance_until with format and default guidance. The description adds no parameter-level syntax or format detail beyond the schema, so the baseline 3 applies.

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 three concrete operations on a specific resource: enable monitoring, stop it, or pause notices for maintenance. An agent can distinguish this from siblings like configure_domain_dns or domain_status by scope, though it never names those siblings explicitly.

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?

It gives clear selection context between the modes (enable/stop vs. maintenance pause) and adds scoping rules such as counting a registry domain once per account and adding only the tab's origin. It does not name an alternative tool or state explicit exclusions, so it falls short of a 5.

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