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

Annotations already provide readOnlyHint=true, and the description aligns by describing a read-only status snapshot. It adds transparency by disclosing the per-zone layout and the specific status fields, which goes beyond the annotation. However, it does not address potential errors or pagination, but this is reasonable for a zero-parameter read-only tool.

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?

The description is exactly two sentences: the first gives the purpose, the second lists the content. It is front-loaded and every phrase earns its place, providing substantial information without fluff or repetition.

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 and no parameters, the description compensates by itemizing the returned fields and the per-zone structure. It does not detail the exact JSON format or error behaviors, but for a simple read-only status helper, it provides a sufficiently complete picture for an agent to understand what to expect.

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-specific information to add. Per the rubric, a zero-parameter tool receives a baseline score of 4, as the description cannot contribute additional parameter semantics beyond what is inherently absent from the schema.

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 'Get SML/SMK zone status' with a specific verb and resource, then elaborates the exact components returned (quorum verdict, canary breakdown, etc.). It distinguishes itself from sibling tools that target access points, hosts, or participants, making the tool's purpose unambiguous.

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 description implies usage when the agent needs this specific status data, but it does not explicitly state when to use this tool over alternatives or mention any exclusions. There is no reference to sibling tools or conditions, so the agent must infer applicability from the resource name and contents.

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