lab_init

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

Annotations already declare destructiveHint=true and non-idempotent; the description adds genuinely new behavioral context beyond them — that the tool never executes a payload and that a confirmation gate (confirm_vm) is mandatory. It stops short of saying what existing state gets overwritten in C:\DriverLab or whether re-running is safe.

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?

Three short, front-loaded sentences with no filler; the scope of the action comes first and the safety constraint ('Never executes a payload') immediately after. Could be marginally tighter by folding the confirm_vm requirement into the same sentence.

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?

Output schema exists, so return values need no explanation, but as a destructive, non-idempotent mutation tool with two undocumented parameters, the description should say more about side effects on existing C:\DriverLab contents and about the confirm_vm contract. Adequate but with clear gaps.

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% for both parameters, so the description must compensate. It only flags that confirm_vm is required; it never explains the expected value/format of confirm_vm (e.g., a confirmation token or a match to vm_name) or what vm_name identifies, so the semantics remain unclear.

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?

Specific verbs plus resource: installs/verifies fixed lab tools in a named directory and creates package/run/evidence subdirectories. It is distinguishable from lab_diagnostics, lab_stage and lab_verify by describing a concrete setup/verification action, though it never explicitly names those siblings as alternatives.

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?

Implied as a setup/precondition step via 'Install or verify' and the 'Requires confirm_vm' prerequisite, but there is no explicit when-to-use versus lab_stage/lab_verify/lab_collect, and no when-not-to-use guidance.

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