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

Annotations already signal write, idempotent, and destructive behavior, so the bar is lower. The description adds a useful caveat that saving does not prove provider delivery or owner receipt, with proof tracked separately. It does not, however, clarify what the destructive aspect means, such as whether existing recipients or rules are overwritten or merged.

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 with no filler. The first sentence states the operation clearly, and the second adds an important behavioral caveat. The structure is compact and front-loaded.

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 schema is thorough, output schema exists, and annotations cover safety traits. The description supplies the key caveat about lack of delivery proof, which is valuable. It would be more complete with explicit overwrite semantics or a why-to-use sentence, but the core information is present.

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 the baseline is 3. The description adds only high-level context by mentioning recipients and escalation rules, but the schema already documents each parameter in enough detail. No extra credit is warranted.

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 uses a specific verb ('Save') with a clear resource ('business-owned staff alert recipients and post-call escalation rules'). This clearly distinguishes the tool from notification/proof siblings by narrowing scope to staff alert configuration and escalation rules.

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 gives no explicit when-to-use guidance or alternative-routing instructions. The note that activation notification proof is tracked separately hints at a boundary with proof tools, but it does not tell the agent when to prefer this tool over siblings like confirm_notification_destination.

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