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

With no annotations, the description carries the full burden and does well: it discloses the link is single-use, expires in 24h, is sent to the account email, and has a side effect of +15 identity score. It omits failure cases (already-confirmed accounts) and any auth/rate-limit notes, but the core behavior is clearly conveyed.

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?

A single front-loaded sentence with no waste. The action, the mechanism, the expiry, and the reward are all packed in without filler.

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 0-param, no-output-schema tool, the description covers the essential behavior: what is sent, its lifetime, and its side effect. Only edge cases (already-confirmed state, resend behavior) are missing, which is a minor gap at this complexity level.

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 takes zero parameters, which per the rubric sets a baseline of 4. There are no parameter semantics to document, and the description correctly focuses on inputs that are implicit (the account from context) rather than inventing schema detail.

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 (email) plus resource (single-use 24h confirmation link) and the delivery target (account email). It is clearly distinct from read tools like get_verification, though it does not explicitly name which sibling handles the alternative confirmation paths.

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 explicit when-to-use or when-not-to-use guidance. An agent cannot tell from the text whether this is a prerequisite for claim_listing, share_passport, or follow-up tools, nor what to do if the account is already confirmed.

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