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

With no annotations, the description carries the full disclosure burden, and it only restates the action. It does not say whether the previous forwarding address is invalidated, whether mail flow is interrupted, whether this is reversible, what authorization is required, or what the response contains. For an operation that mutates live alert routing, those omissions matter.

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; efficient. It is short to the point of under-specification rather than verbose, so credit is for structure, not completeness.

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 zero-parameter, no-output-schema tool this is minimally adequate: the agent knows what the tool does. But it does not cover the outcome of rotation (e.g., a new address being generated and returned) or the operational consequences, which an agent may need before triggering a change to bank-alert forwarding.

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; the baseline for a parameterless tool applies.

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 gives a specific verb (rotate) and a specific resource (the bank-alert forwarding inbox address), so the agent knows exactly what changes. It is clear on its own, but it does not distinguish itself from the sibling rotate_webhook_secret or from the surrounding bank-alert tools like save_alert_sources, so it falls short of a 5.

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?

There is no statement of when to rotate, under what conditions (compromise, rotation policy, config change), or which sibling to use instead. The agent gets no routing guidance at all beyond the tool name.

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