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

The description adds genuinely non-obvious behavior beyond the annotations: the dismissal is transient and the alert can reopen on a later pass if the condition recurs. That reconciles with idempotentHint=false and softens destructiveHint=true. It still does not say what authority or scope is required, whether an already-dismissed alert errors, or what the call returns.

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 sentences, no waste, with the write classification and the identifier options front-loaded and the caveat about reopening placed immediately after. Nothing could be removed without losing information.

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 two-parameter mutation with no output schema, the definition covers purpose, identifiers, and the key transient-behavior caveat, and the annotations carry the safety profile. A note on the failure mode of an unknown or already-dismissed alert would have closed the remaining gap.

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% and both parameters are optional and nullable, so the schema alone is silent. The description names both identifiers and the "or" phrasing usefully implies either one suffices, but it gives no format guidance for the UUID, no precedence rule if both are supplied, and no statement about what happens when neither is provided.

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?

"Close an ad alert" pairs a specific verb with a specific resource, and the [write] tag flags the mutation class immediately. It does not name the counterpart tool (list_ads_alerts) explicitly, so sibling differentiation is left to inference, which keeps it off a 5.

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?

"By hand" implies a manual intervention path versus automated handling, which gives weak when-to-use signal. There is no explicit statement of when to dismiss versus leave an alert, nor any prerequisite such as needing the alert to exist or belonging to a given ads account.

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