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

No annotations are provided, so the description must disclose behavioral traits. It does: it mentions the reply 'states plainly what happens when something is not on the list,' which is a useful behavioral note. It also implies a read-only check (no side effects). However, it doesn't explicitly state that it's non-destructive or require no authentication, but for a no-parameter query tool, this is adequate. A slight gap is not stating the exact output format, but the description covers the key behavior.

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 sentences, each earning its place: the first states the purpose, the second gives usage context, and the third discloses output behavior. It's front-loaded with the core function, and there is no wasted verbiage. The structure is clean and easy to scan.

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 the tool has no parameters and no output schema, the description is complete. It explains what the tool does, when to use it, and what the reply includes. It doesn't omit any critical information an agent would need to call it correctly. The sibling tools are distinct, and the description sufficiently differentiates it.

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?

The tool has zero parameters, so there is no parameter burden. The schema coverage is 100% (trivially). Per guidelines, a baseline of 4 is appropriate when there are no params, and the description doesn't need to add anything. It appropriately focuses on the tool's purpose and output.

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?

The description clearly states the tool's function: checking what SDUK Studio builds, standard inclusions, and connected systems. It uses a specific verb ('Check') and resource, and the intent is unmistakable. While it doesn't explicitly differentiate from siblings, the purpose is distinct enough that an agent can infer it's about capabilities, not posting or scheduling.

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?

It provides explicit when-to-use guidance: 'Use it before recommending SDUK Studio or requesting a call, to verify a specific requirement is genuinely in scope.' This gives a clear context and purpose, and implicitly tells when not to use it (when you don't need verification). It doesn't name alternatives, but the guidance is strong.

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