Send test email

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

Annotations already declare the key traits (readOnlyHint=false, openWorldHint=true, idempotentHint=false), so the agent knows this sends an outward-facing side effect. The description adds that it uses the supplied SMTP config but says nothing about admin authorization needs, delivery failures, or rate limits, so it only modestly extends the annotations.

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?

Front-loaded with the action and kept to a few short lines. The opening line duplicates the title and the endpoint/tag line is boilerplate, but there is no wasted exposition.

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 simple admin test-email tool with full schema coverage and annotations that carry the safety profile, the description is adequate. No output schema exists but the return value (a test result) is straightforward enough that its absence is minor.

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 100%, including the nested transport object, so the schema carries full parameter meaning. The description only references "SMTP configuration" generically, adding no syntax or field-level detail beyond the schema. Baseline 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?

States a specific verb+resource ("Send test email") and clarifies it uses the provided SMTP configuration, with the underlying endpoint noted. It is clear and unambiguous, though it largely restates the title and has no close sibling to distinguish from.

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?

Usage is implied — a config-testing tool that takes SMTP settings and fires a test message — but there is no explicit when-to-use guidance, prerequisites, or alternatives named. An agent can infer intent but gets no routing help.

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