Create mail forwarder

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

Annotations already declare readOnly=false, destructive=false, idempotent=false and openWorld=true, so the safe-creation profile is covered. The description adds nothing beyond that (no conflict/duplicate behavior, no permission or quota notes), but it does not contradict the annotations either.

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?

One tight sentence with the resource and the alias relationship front-loaded and the '(alias)' gloss adding useful terminology. No filler whatsoever.

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 and annotations covering safety semantics, the description only needs to fix the tool's identity and it does. The remaining gap is that it never mentions the required vserver scoping, which matters for a multi-webhosting account, but the schema covers that parameter in 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?

Schema coverage is 75% with descriptions on address, vserver and fwd_addresses; the description only restates address-to-destination mapping and the 'one or more' cardinality that minItems already encodes. The `comment` parameter and the vserver scoping requirement receive no elaboration in the description.

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 concrete verb ('Create') with a specific resource ('e-mail forwarder (alias)') and states the forwarding relationship between `address` and the destinations. It implicitly distinguishes itself from the list/update/delete forwarder siblings, though it never names them.

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 when-to-use guidance, no mention of prerequisites (e.g. needing an existing webhosting/vserver, see list_webhostings), and no statement about what happens if the alias already exists or how it relates to update_mail_forwarder/create_mail_account.

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