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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so safety is covered. The description adds genuine value by disclosing the shape of the returned aggregate payload (enrollments, completed, exited, open/click rates per step), which is important since there is no output schema.

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?

A single, front-loaded sentence with no filler; the metric list is compact and informative.

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?

With no output schema, the description usefully enumerates the returned metrics, which is the main thing the agent needs. Minor gap: no indication of the time window or whether results are aggregated over all time.

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 100%, so both parameters (apiKey, automationId) are already documented in the schema. The description adds no extra parameter semantics beyond implying the stats are scoped to one automation.

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?

Specific verb (get) and resource (automation stats) with an explicit enumeration of the metrics returned: enrollments, completed, exited, open/click rates per step. Clear on what it does, but does not differentiate itself from neighbors like get_automation or list_automation_enrollments.

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?

Usage is only implied by 'for an automation' – the agent can infer this is the analytics view rather than the config view, but no explicit when-to-use or when-not-to-use guidance against sibling tools such as get_automation, get_campaign_stats, or list_automation_enrollments is given.

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