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

With no annotations provided, the description carries the full responsibility for behavioral disclosure. It states 'Get the current status' which implies a read-only operation, but it does not mention potential outcomes (e.g., whether the receiver must be started), the nature of the status values, or any side effects. This is a minimal disclosure that leaves important operational details unspecified.

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 sentence that is front-loaded with the main action and target. It contains no filler, fluff, or redundant information, making it highly concise and easy to parse.

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 the tool has no parameters, no output schema, and no annotations, the description is somewhat thin. It explains the basic function but omits context such as what the returned status represents, whether the receiver must be active to get a meaningful response, or how this relates to the lifecycle tools (start_smtp_receiver/stop_smtp_receiver). For a zero-parameter read tool, this may be adequate, but it leaves the agent without a full picture of expected results.

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 tool has zero parameters, and the schema coverage is effectively 100% (an empty object). The baseline for parameter semantics is 4 when there are no parameters, as the description need not add parameter details. The description adds nothing about parameters but is not required to.

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 'Get the current status of the SMTP forward receiver' clearly identifies the action (get) and the target resource (SMTP forward receiver status). It distinguishes itself from sibling tools like start_smtp_receiver and stop_smtp_receiver by focusing on status retrieval, making the purpose unambiguous.

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 provides no guidance on when to use this tool versus alternatives such as get_health_status or get_mailbox_status. While the purpose is clear, there is no explicit context about prerequisites, typical scenarios, or exclusions, leaving the agent to infer usage from the name alone.

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