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

Annotations already establish readOnlyHint, idempotentHint, and openWorldHint=false, so the safety profile is covered. The description adds real behavioral context beyond them: the admin-only access requirement and the routing rules (email and Slack get the finished cycle; Slack additionally gets the daily digest and enabled high-signal alerts).

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?

Front-loaded with the purpose, which is good, but the latter half spends sentence-level detail describing channel routing outcomes that are already carried by the existing output schema, so not every sentence earns its place.

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 an output schema present, the description need not explain return values, and annotations cover the read-only safety profile. The admin-only note fills the main remaining gap; adding a pointer to the sibling setters would make it fully complete.

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 takes zero parameters, so there is nothing for the description to disambiguate. It correctly adds no parameter information, matching the baseline for a no-input tool.

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 ('Gets ... delivery settings') and enumerates what those settings cover: monitoring cycle cadence, plan-allowed cadences, and post destinations. It is clearly a read tool, but it doesn't explicitly differentiate itself from the sibling setters set_delivery_channels / set_monitoring_cadence or from get_plan_and_limits.

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 only usage guidance is the constraint 'Admin only.' There is no explicit statement of when to call this versus its write counterparts, though the read/write split with set_delivery_channels and set_monitoring_cadence is strongly implied.

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