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

Annotations already declare destructiveHint=true and idempotentHint=true, so safety is covered. The description adds real value beyond that: it discloses the blast radius — past emails remain readable after deletion — which tells the agent the action is recoverable in terms of data. It does not say whether the deletion itself can be undone.

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 compact sentences with the scope constraint up front and the retention behavior second; no filler.

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 one-parameter destructive tool with no output schema, the description covers what is removed and what survives. The remaining gap — how to discover a valid alert_id — is minor but real given the undocumented parameter.

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?

There is a single required parameter (alert_id) with 0% schema description coverage, and the description never names or explains it. The phrase 'one of the extra alerts' loosely implies selecting an existing alert, but nothing states the ID format or where to obtain it.

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 (Delete) and resource (one of the extra alerts), and adds a scoping qualifier distinguishing secondary alerts from the main one. It does not name a sibling tool for managing the main alert, but the resource is unmistakable against create_alert/update_alert/list_alerts.

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 parenthetical '(not the main one)' implies a usage boundary, but no alternative or next step is offered for the excluded case (the main alert). An agent must infer that list_alerts supplies the alert_id.

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