status

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is fully covered by structured data. The description adds nothing beyond that: it does not say whether the call is cheap or slow, whether it polls a remote host (relevant given openWorldHint), or what the response contains. With no output schema, the description was the only place to disclose return shape and it does not.

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?

A single short sentence with no filler, and the key noun phrase is front-loaded after the verb. It is efficiently written; the brevity is a symptom of missing content rather than of wordiness, which is penalized under contextual completeness instead.

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 read tool, the surface area is small, so the description is almost adequate. The critical gap is that there is no output schema and the description does not describe what 'status' returns, leaving the agent unable to plan how to use the result – this is the one thing a status tool's description must supply.

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 takes zero parameters, so there is no parameter semantics to explain and the baseline of 4 applies. Nothing in the description misleads about inputs.

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 pairs a specific verb ("Read") with a specific resource ("this VM's status"), which cleanly separates it from the action siblings (click, move, type, scroll, start, stop) that manipulate the VM rather than report on it. It stops short of 5 because "status" itself is undefined – an agent cannot tell whether this returns power state, health, connection info, or a full metadata blob.

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?

There is no explicit when-to-use guidance, no mention of prerequisites, and no reference to any alternative or companion tool. The only hint is implied: an agent would infer it should call this before start/stop to check the VM's current state, but that inference is left entirely to the reader.

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