Verify the bridge and hub are reachable

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

Annotations already declare readOnlyHint, openWorldHint, and idempotentHint. The description adds value by disclosing that it reports which layer failed and next steps, plus the hub-configuration condition. No contradiction found.

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?

Two concise sentences cover purpose, conditionality, output, and safety without wasteful repetition, keeping every phrase meaningful.

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?

Although no output schema exists, the description clearly states what is checked and what is reported (failed layer and remediation). It avoids overspecifying an internal format, which is acceptable for a diagnostics tool, but could mention whether a hub absence changes output.

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?

With zero parameters, the baseline is 4 per the rubric. The description needs no parameter-level elaboration since there is nothing to configure, and the schema's 100% coverage trivially satisfies requirements.

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 uses a specific verb ('Checks') and identifies precise resources (fetchproxy browser bridge, hub appointments page), clearly distinguishing it from the list/read siblings by focusing on reachability verification.

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 clearly implies this tool is for diagnosing connectivity before using functional tools, and conditionally checks the hub only if configured. However, it does not explicitly state when to use it over alternatives or mention exclusions.

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