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

Annotations only declare readOnlyHint=true, but the description adds substantial behavior: it opens the URL, validates a real page rather than a bare 200, is free, and wakes a sleeping server that gets billed as awake. This wake-and-bill side effect is exactly the kind of context the agent needs to invoke it responsibly.

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?

Front-loads the core question ('Is the live app up right now?') and then packs in scope, behavior, and cost. The parentheticals are dense but each carries distinct, useful information; only marginal tightening is possible.

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, the description still explains what is reported (whether a real page is served) and covers cost and side effects. The single parameter is left unexplained, which is the only notable gap for this simple one-param tool.

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% and the description never mentions projectId or its format, so it adds no semantic meaning beyond the schema. For a single, self-evident project selector the omission is minor, keeping this at a minimum-viable 3.

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: checks whether the live app is up by opening its URL and reporting whether it serves a real page, not just an HTTP 200. The scope is unambiguous, but it never names a sibling (e.g., get_status, project_overview) to distinguish itself by name, so differentiation relies on 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?

Gives clear context for use: it is free, wakes a sleeping server (billed as awake), and is the only place servers are checked since the monitor covers only web-hosting sites. It stops short of explicit when-not-to-use guidance or naming alternative tools for overlapping needs.

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