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

Annotations already declare destructiveHint=true, idempotentHint=true, readOnlyHint=false, and openWorldHint=false, so the safety profile is covered. The description adds real value on top: 'Permanently' signals irreversibility and the 'WRITE: available to any authenticated user' note states the auth requirement, which annotations do not capture.

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 very short sentences, with the destructive action front-loaded and the authorization note second. Every clause carries information; nothing is padded or repeated from the title.

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 and annotations covering idempotency and destructiveness, the permanence and auth notes make it largely complete. It stops short of describing what happens to dependent alert destinations or the response on an unknown rule id.

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 coverage is 100% and the single ruleId parameter is fully documented as a UUID in the schema. The description adds no format, sourcing, or lookup guidance beyond that, 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?

States a specific verb ('Permanently delete') and resource ('an alert rule'), which separates it from the sibling deletes (delete_dashboard, delete_api_test, delete_ignore_rule) without opening any schema. An agent can identify the target resource unambiguously.

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 description notes the authorization scope ('available to any authenticated user') but gives no when-to-use guidance, no prerequisites, and no alternatives. Notably, siblings like set_alert_rule_status could disable a rule rather than delete it, and delete_alert_rule never mentions this trade-off.

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