release_model

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

No annotations, so the description carries the full burden. It discloses the side effect (unloads model, returns freed_mb), the safe-when-empty behavior, and ties the timing to look_at_screen. It does not say whether re-loading is costly or whether concurrent calls conflict, but the essentials are covered.

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 sentences; the purpose and return value come first, then the lifecycle guidance. No waste.

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?

A zero-param, no-output-schema teardown tool needs to explain timing, safety, and return value, and it does all three. Minor gap: it doesn't state the consequence of releasing too early, but that is secondary.

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?

Zero parameters, so baseline is 4. The description does not invent any, correct.

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 (unload) and resource (the local model), plus the side effect (freed memory_mb). Distinguishes from siblings ping/health/look_at_screen, none of which release resources.

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?

Explicit 'when': at the end of your task, after the last look_at_screen. Also states it is safe when nothing is loaded, removing a common hesitation.

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