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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the irreversible nature is covered structuredly. The description adds the admin permission requirement, which is genuinely useful extra context, but stays silent on the safety parameters (confirm, confirm_live, dry_run) that govern whether the delete is actually executed.

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, front-loaded with the action and followed by the permission constraint, so nothing is wasted. But the brevity is under-specification for a 34-parameter destructive tool rather than genuine economy.

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?

An output schema exists, so return values need no explanation, and annotations cover the safety profile. Still, for a destructive tool with 34 undocumented optional parameters, the description omits the essentials an agent needs: how to identify the rule to delete and whether a confirmation flag is required.

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?

The schema has 34 parameters at 0% description coverage and zero required fields, so the description carries the full burden. It names none of them, giving no indication whether rule_id, name, scope, or a combination identifies the target rule, nor that dry_run and confirm exist. An agent cannot map intent to arguments from this text.

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+resource ('Delete an ads alert rule'), which cleanly distinguishes it from automate_upsert_alert_rule and the sibling delete tools for SEO and automation rules. It is not tautological, though it offers no detail beyond the title.

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?

'Admin only' gives a real prerequisite for use. However, it says nothing about when to choose this over automate_upsert_alert_rule (e.g., deactivating via is_active) or about discovering rules first with automate_list_alert_rules, leaving the routing to inference.

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