test_smtp_connection

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

No annotations are provided. The description adds useful context: the tool falls back to environment variables if smtp_config is not provided, and returns a connection test result or error. However, it does not disclose potential side effects or if the test is read-only, which is important for a test operation.

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 well-structured with an Args section and Returns section. It is concise enough but could be slightly shortened by removing the docstring format. Still, every sentence adds 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?

The tool has an output schema (not detailed), but the description's return statement is vague ('Connection test result or error message'). Given the simplicity of the tool and the presence of sibling tools, the description is adequate but leaves room for more specifics about the return structure.

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% for the sole parameter 'smtp_config'. The description compensates by listing the expected nested fields (host, port, secure, etc.) and explaining the fallback behavior, which adds significant meaning beyond the raw schema.

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 clearly states 'Test SMTP connection' with a specific verb and resource. It is distinct from siblings 'send_custom_email' and 'send_simple_email' which focus on sending emails, not testing connections.

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 usage for testing SMTP connectivity, but does not explicitly state when to use versus alternatives like sending emails. No exclusions or prerequisites are mentioned, leaving the agent to infer context.

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