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

With annotations already declaring read-only, idempotent, non-destructive and closed-world behavior, the description adds the return contract (status pending|confirmed|expired plus access_token on confirmed), which matters because no output schema exists. It also explains the two-step ordering context, though it says nothing about expiry timing or error cases.

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?

Two tight sentences: the flow position and action come first, then the return values, then the trigger and fallback. No filler and nothing buried.

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 a single fully-documented parameter, no output schema, and annotations covering the safety profile, the description supplies exactly what is otherwise missing: the return values and the pending-state handling. An agent can invoke and interpret it without more.

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 the schema already documents request_id as coming from ruforge_profile_request_code. The description only implies that provenance via the 'step 2' framing, adding no format or syntax detail beyond the schema, so the baseline 3 applies.

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 and resource (check whether the user confirmed the profile via the email link) and anchors it as step 2 of a flow, which places it relative to ruforge_profile_request_code. It does not, however, distinguish itself from the similarly named sibling ruforge_profile_confirm, leaving some ambiguity for an agent choosing between them.

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?

Gives a concrete trigger ('call when the user says they pressed the button / is done') and prescribes the follow-up branch on pending (ask them to check email or send the code). It stops short of naming alternatives or an explicit when-not-to-use condition, so it sits below a full 5.

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