email_pop_create

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

With no annotations, the description carries the behavioral burden. It adds useful operational context such as 'quota_mb: 0 = unlimited', 'impersonate: Owning user', and 'confirm: Required', but it does not disclose duplicate-mailbox behavior, permissions, or side effects. The 'confirm: Required' note is also ambiguous and appears to conflict with the schema's optional confirm field.

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?

The description is front-loaded with a clear one-line purpose followed by a compact argument list. No sentences are wasted, though a couple of arg lines such as 'domain: Domain' add little value.

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?

An output schema is present, so return values are covered. The description touches all parameters, but for a mutation tool with no annotations it still lacks duplicate-handling behavior, prerequisites, and unambiguous confirmation semantics. This makes the definition adequate but not 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?

Schema description coverage is 0%, so the description must compensate. It does for most parameters: 'user: Local part only (before @)', 'quota_mb: 0 = unlimited', 'impersonate: Owning user', and 'confirm: Required' add real meaning. However, 'domain: Domain' is tautological and 'confirm: Required' is ambiguous.

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: 'Create a mailbox (user@domain)', including the address format. This clearly distinguishes it from email_pop_delete, email_pop_modify, and users_create without needing to inspect siblings.

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?

No guidance is given on when to use this tool versus alternatives. There are no prerequisites, exclusions, or mention of related tools like email_pop_modify or email_pop_delete; only 'Create a mailbox' is provided.

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