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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuine value beyond that by disclosing the return surface: the six possible status values (pending, started, completed, failed, cancelled, expired) and a human-readable next_step, which is essential since there is no output schema. It does not say whether statuses are terminal or how often to poll, a minor gap.

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?

Effectively two sentences, purpose front-loaded, with the action-type list in a parenthetical so it does not bury the main claim. Slightly convoluted opening ('Whether the person finished a step...') reads as a fragment, but nothing is wasted.

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 single-parameter, read-only polling tool with no output schema, the description covers what triggers a call, what the input is, and what the caller gets back. Polling/waiting behavior and whether 'failed'/'expired' are terminal are the only notable omissions, and those are modest for this complexity.

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% with a single parameter, so the baseline would be 3. The description goes further by explaining provenance — the action_id comes from a prior tool result that returned 'action_required' — which tells the agent where the value originates and reinforces that it cannot be invented.

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 — checking whether a person finished a FastCAC step — and enumerates the concrete action types it covers (confirming a change, paying, uploading documents, NIN, WhatsApp verification). This distinguishes it from siblings like get_nin_request_status by tying it to the generic action_id returned by any tool with status 'action_required'.

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 precise triggering condition: use this when another tool returned status 'action_required' along with an action_id. There is no explicit when-not or mention of polling cadence, but the precondition is clear enough that an agent knows exactly when to reach for it.

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