Mail Send Message

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

The description adds no behavioral context beyond the annotations. While destructiveHint=true and idempotentHint=false are useful signals, the description does not explain side effects, delivery behavior, account requirements, or failure modes.

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, but it is boilerplate rather than concise useful content. A single sentence that only repeats the tool name does not earn its place and provides no structured information for an agent.

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 7-parameter, destructive, non-idempotent email-sending tool, this description is completely inadequate. It omits required conditions, account selection context, attachment semantics, and any distinction from sibling mail tools. An agent would have to guess essential calling details.

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%, and the description provides no parameter semantics. The input schema property names like 'to', 'cc', 'bcc', 'subject', and 'attachments' are somewhat self-explanatory, but the description offers no additional meaning or format guidance for fields like 'from_account' or 'attachments'.

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 is essentially a tautology: it restates the tool name 'mail_send_message' and says it is 'exposed through Apple-Tools-MCP' without stating what the tool does. The title hints at sending a message, but the description itself provides no functional meaning.

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 the many related mail tools such as mail_compose_draft, mail_reply_message, or mail_forward_message. No conditions, prerequisites, or exclusions are provided.

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