Verify the fetchproxy bridge end-to-end

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

Annotations already mark read-only and idempotent, and the description goes further by detailing exactly what the tool does externally: it fetches a small public URL through the bridge and reports bridge role, port, version, extension-link state, elapsed time, and a plain-English failure-mode hint. It also explicitly states 'Read-only, no auth required,' matching the annotations without contradiction.

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 front-loaded with the core action, then enumerates the diagnostic outputs, and closes with a clear usage directive. Every sentence adds necessary context for selecting and invoking the tool; there is no filler or redundancy beyond the helpful read-only/auth note.

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 zero-parameter healthcheck with no output schema, the description is remarkably complete: it names the exact URL being tested, lists the returned diagnostics, explains the failure-mode hint, and states the intended use case. An agent has enough context to invoke the tool and interpret its result without additional documentation.

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 input schema has zero parameters, so the baseline for this dimension is 4. The description correctly implies no input is needed by showing the fixed URL and the diagnostic nature of the tool, adding no irrelevant parameter guidance.

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 states a precise verb and resource: it 'round-trips a small public www.alltrails.com URL through the fetchproxy bridge' and returns diagnostics. This clearly distinguishes the healthcheck from sibling data-retrieval tools like alltrails_get_trail or alltrails_search.

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 gives an explicit trigger: 'Call this when a real tool fails and you want to know which hop broke.' It also notes it is read-only and requires no auth, which clarifies safe invocation. It does not explicitly enumerate when not to use it, but the diagnostic purpose is unambiguous.

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