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

Annotations already cover readOnlyHint and destructiveHint, but the description adds real context: 'Changes nothing in the account', the dismissal affordance via dismiss_suggestion keys, and notably the background DNS/home-page read for stale sites explained by 'a later call includes what that finds' — which justifies the non-idempotent hint. This is disclosure beyond structured fields; only the lack of ordering/pagination detail keeps it from a 5.

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 usage trigger and the alternative are front-loaded, and every sentence carries information. The long enumeration of gap categories is dense but earns its space as the only place the return contents are described.

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?

With no output schema, the description fully specifies the return shape — gaps worst-first, each paired with the fixing tool and an optional dismiss_suggestion key — plus the latency caveat about background reads. An agent has everything needed to call and interpret the result.

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 both parameters are already documented as filters. The description adds no syntax or scoping semantics for site/group beyond implicitly framing results as account-wide. Baseline 3 is appropriate since the schema carries the parameter burden.

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 ('review') and enumerates the exact gaps returned: unwatched services, certs expiring in 30 days, sites on no status page, thin alerting, long-paused monitors. It explicitly distinguishes itself from get_account_overview, so an agent can separate it from siblings without opening a schema.

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?

Opens with an explicit trigger list ('when the user asks what they are not monitoring, what could break without them knowing...') and closes with a hard exclusion plus the named alternative: 'Not for what is down now: use get_account_overview.' Both when-to-use and when-not are covered.

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