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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds the plan gate (Starter+), which is useful context, but says nothing about result volume, ordering, or pagination behavior for what could be a long list of rules.

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 with the scope stated first and the plan constraint second; nothing is wasted. It is arguably too terse, but that is a completeness problem rather than a structural one.

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?

The output schema relieves the need to describe return values, but for a 33-parameter tool with zero schema descriptions the description leaves the agent with no idea which filters are meaningful or which are inert for SEO rules. It does not do enough to make the tool callable with confidence.

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% across 33 parameters, and the description names none of them. Names like 'from_amount'/'to_amount', 'min_spend', 'cooldown_hours', and 'report_type' are not self-explanatory in an SEO alert-rule context, so the description entirely fails to compensate for the coverage gap.

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 (List) and a scoped resource (Search Console / AI-referral alert rules), which distinguishes it from the broader sibling automate_list_alert_rules and automate_list_automation_rules. It does not explicitly name those siblings, but the qualifier 'Search Console / AI-referral' is enough for an agent to route by domain.

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 'Starter+ plan' note gives a real prerequisite that tells the agent when the tool is unavailable, but there is no statement of when to prefer this over automate_list_alert_rules or the upsert/delete SEO siblings. Usage is implied by the domain qualifier rather than stated.

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