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

Annotations already carry the important behavioral facts: destructiveHint=true, idempotentHint=true, readOnlyHint=false, so the agent knows this is a permanent, repeatable-safe mutation. The description adds plan entitlement ('Pro only'), which annotations do not cover, but says nothing about irreversibility, confirmation expectations, or behavior for nonexistent/already-deleted ids.

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 short sentences, zero filler, with the action and scope front-loaded and the eligibility constraint second. Nothing to trim.

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, no-output-schema tool, annotations cover the safety profile and 'Pro only' covers entitlement, but the description omits failure semantics (nonexistent id, non-Pro caller) and whether deletion is permanent — the gaps an agent most needs before invoking a delete.

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 alert_id is documented with its origin ('from my_alerts'), so the schema does the work. The description's 'by id' adds nothing beyond it — baseline 3 is appropriate for a single fully-documented parameter.

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 (deletes) and resource (one of the user's alerts) plus the selector (by id), which is unambiguous against siblings like create_alert and my_alerts. It stops short of naming a look-alike tool to distinguish from, but none of the listed siblings overlap, so the purpose is clear.

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?

'Pro only' is a real prerequisite, but there is no guidance on when to delete versus archive, whether the caller should first verify the alert via my_alerts (which the schema references), or what to do on a bad id. Usage is only implied by the name.

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