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

Annotations already declare readOnly, idempotent, non-destructive and closed-world behavior, so the safety profile is covered. The description adds value beyond that by disclosing what the result contains (observed time and expiry) and explicitly ruling out side effects ('does not reserve capacity or initiate work'), which is exactly the kind of context annotations cannot express.

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?

Three short sentences, zero filler, with the core check front-loaded and the exclusions following. Every sentence earns its place.

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 read-only tool with no output schema, the description is nearly complete: it covers the purpose, the exclusions, and what the response conceptually includes. The only gap is any hint about failure modes when a service is not accepting work, which is minor.

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 description coverage is 0% for the single serviceId parameter, so the description carries the burden and it does not explain the parameter at all. The name 'serviceId' with uuid format is largely self-explanatory against the tool's stated resource, keeping this at an adequate-but-unexplained baseline rather than a failure.

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 a service is reviewed and currently accepting work') and clarifies the return content. It implicitly distinguishes itself from search_available_services by operating on a single serviceId, but it never names the sibling alternatives, so the differentiation is left to inference.

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?

The clause 'Does not reserve capacity or initiate work' usefully sets a negative boundary, telling the agent this is a pure check. However, it gives no positive routing guidance (when to prefer this over search_available_services or get_service_evidence), so usage is only implied.

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