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

Annotations already declare read-only, idempotent, closed-world, and non-destructive behavior, so the safety profile is covered. The description adds useful behavioral context by defining what a subscription maps (alert channel to trigger) and enumerating the supported trigger types, though it does not discuss auth, pagination, or response shape.

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 sentences, front-loaded with the core action and scope, followed by a concise API mirror note. Every sentence contributes useful information without redundancy.

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 parameterless list tool with rich annotations and no output schema, the description supplies sufficient context: it defines the resource, the trigger taxonomy, and the API endpoint it mirrors. An agent can call and interpret it without further description-level detail.

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 tool has zero parameters, and the schema is empty with 100% coverage. Per the baseline for parameterless tools, the description does not need to compensate for missing parameter semantics, so a 4 is appropriate.

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?

The description states a specific verb and resource: listing alert-channel subscriptions to triggers. It further distinguishes the mapping from sibling tools by naming the trigger categories (budget spend_threshold vs account-wide event_overage/cost_anomaly/commitment_expiring/sync_failure).

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 implies when to use the tool by explaining the subscription mapping and trigger scope, but it does not explicitly say when to choose this tool over siblings like list_alert_channels or list_alert_deliveries. No exclusions or alternatives are named.

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