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

Annotations already cover the safe-read profile, and the description adds real behavioral context beyond them: a ~20s response bound, a possible in-progress outcome with an ETA, the polling cadence, and state-dependent output depending on whether the app is already paid for. Missing details on error/invalid check_id behavior keep it from a 5.

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 verb and purpose, but the middle is a long run-on sentence packing two alternate result shapes and a price into one clause chain. It is dense rather than wasteful, but could be broken into shorter statements for scannability.

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?

With no output schema, the description must explain return values, and it does so thoroughly, including severity levels, the $79 paid-fix path, and the in-progress/polling outcome. Only error-state and check_id-invalid behavior are left unspecified.

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 single parameter is documented ("From check_live_app"), so the schema carries the load. The description only adds that the same check_id should be reused across polls, which is marginal added semantics.

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 ("wait for a check ... and read its result") and enumerates the payload in detail. It names the confirm_fix re-check case, giving partial sibling differentiation, but does not clarify how it differs from check_repair_status, which sounds adjacent.

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 an explicit operating protocol: it answers within ~20 seconds, may return "still running" with minutes remaining, and should be re-called with the same check_id a minute later. It lacks explicit when-not guidance or a named alternative tool beyond the confirm_fix reference.

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