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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds a concrete list of the metrics returned but does not disclose any additional behavioral traits such as latency, output format, or error conditions. With annotations carrying the safety burden, a 3 is appropriate.

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: the first states the trigger scope with concrete examples, the second routes to specific siblings for other kinds of info. No filler or redundancy. The most important routing information is front-loaded.

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 simple, read-only tool with one parameter, a rich output schema, and strong annotations, this description fully equips an agent: it knows when to call it, what it returns (host facts), and which alternatives to use for other concerns. Nothing essential is missing.

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 100%, and the 'device' parameter is already documented as 'ReMCP device id returned by list_devices. Required for every device operation.' The tool description adds no extra parameter semantics beyond what the schema already provides, so the baseline of 3 applies.

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 purpose: 'machine health and host facts such as operating system, CPU load, memory, free disk space, or uptime.' It differentiates from siblings by explicitly naming environment and get_runtime_info as alternatives for other domains, leaving no ambiguity about what this tool covers.

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?

Explicitly gives the when-to-use condition ('when the user asks about machine health and host facts') and names alternative tools for adjacent concerns ('Use environment for PATH/shell/runtime environment details, and get_runtime_info for ReMCP-specific version, policy, and limits.'). This is model routing guidance.

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