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 structurally. The description's only added behavior claim, "never creates another computer," largely restates the read-only hint, though it does usefully counter the misleading name; it says nothing about not-found/failure behavior.

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 compact clause with the read-only guarantee front-loaded and no filler. It is efficient, arguably to the point of under-specification, but no sentence is wasted.

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 one-parameter lookup with full annotations this is nearly sufficient on safety, but it omits what a request key is, where it comes from, and what the call returns or does when the key is unknown. The agent cannot call this correctly without outside knowledge.

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 single required parameter 'key' is documented nowhere in the schema. The description hints the key is a "request-key," which is some meaning beyond the bare schema, but leaves the key's format, source, and lookup semantics undefined.

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 verb and resource ("request-key lookup") and flags it as read-only, and explicitly negates the creation behavior the name 'machine_request' suggests. However, "request-key" is unexplained jargon, so an agent still cannot confidently say what record is being fetched without inferring from the sibling list.

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?

No when-to-use guidance and no named alternative. The phrase "never creates another computer" implicitly points away from machine_create, but the description never says when to choose this lookup over machine_get, machines, or keys — the agent must guess.

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