testmail_send

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It explicitly labels the operation as 'write' and states that confirmation is required, which is important context beyond the tool name. It does not, however, explain what confirmation entails, what side effects occur, or what happens if confirmation is missing.

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 a single tight sentence with the core action front-loaded. The parenthetical 'write — requires confirmation' adds important behavioral context without bloat. It is concise, though it lacks structure that would help an agent parse parameter or confirmation-flow details.

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?

Given no annotations, no output schema, and three undocumented parameters, this description is far too sparse for reliable invocation. It communicates the essential write/confirmation nature but leaves the confirmation mechanism and parameter semantics entirely unexplained.

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 schema has three parameters — user_code, confirm_token, and confirmation_id — with zero description coverage, and the description adds no meaning to any of them. The phrase 'requires confirmation' loosely hints at the confirmation-related parameters but does not explain their roles or how to obtain valid values.

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 clear action and resource: 'Send a test mail'. It signals a write operation requiring confirmation, which makes the tool's purpose immediately understandable. However, it does not explicitly differentiate it from sibling tools like sys_mailalert or sys_webhook, so it stops short of full sibling differentiation.

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 guidance on when to use this tool versus alternatives, and no mention of prerequisites or excluded scenarios. The only hint is the phrase 'requires confirmation', which implies a confirmation step but does not explain when this tool is appropriate.

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