smtp_verify_account

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

The word 'test' implies a read-only, non-mutating operation, but no annotations are present and the description does not explicitly state that no message is sent or that only connectivity/auth credentials are checked. It gives a reasonable behavioral hint without fully owning the transparency burden.

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 short and front-loaded, with no filler words. It is appropriately concise for a simple tool, though it could have included a little more operational context without becoming bloated.

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 tool with one optional parameter and an available output schema, the description is largely adequate. The main missing context is usage guidance and explicit side-effect clarity, which would make it 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?

There is only one optional parameter, account_id, and the schema fully describes it, including its default value. The description adds no extra meaning beyond the schema, so the baseline of 3 is appropriate.

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 ('Test') and names the specific resource ('SMTP account') and the exact concern ('connectivity and authentication'). It clearly separates this from sending/forwarding/reply tools and from the equivalent IMAP verification tool.

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 implies the intended use: verify an SMTP account's reachability and credentials. However, it does not explicitly mention alternatives such as imap_verify_account, prerequisites like prior setup/configuration, or when not to use it.

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