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

Goes well past the annotations by disclosing the lockout threshold, the required scope (locations:read, any member), and the fact that the call returns updated account status. The one gap is a mild tension with idempotentHint=true, since repeated wrong codes escalate state (attempt counter) rather than being a pure no-op; the description does not reconcile this.

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?

Four short sentences, each load-bearing: purpose, sourcing rule, failure/fallback, return value, plus scope. The core action and the sourcing instruction are front-loaded, and nothing is redundant with the schema.

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 one-parameter tool with a fully documented schema and an output schema absent, the description covers the return value, the authorization scope, the failure mode, and the alternative tool. An agent has everything needed to select and invoke it correctly.

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 coverage is 100% and already documents the six-digit format with an example, so the schema carries the syntax burden. The description still adds value the schema cannot: the code must come from the user and must not be guessed, which is provenance guidance rather than format.

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 (confirm/verify) and resource (the owner's email) and names the exact mechanism (six-digit code SimpleDock emailed). It also implicitly separates itself from resend_verification_email by referencing it as the fallback path, so an agent can distinguish the two without opening either schema.

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?

Explicitly tells the agent to ask the user for the received code and never guess one, states the when-not condition (five wrong codes triggers lockout), and routes the agent to the named alternative resend_verification_email in that case. This is full when/when-not/alternative coverage.

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