Renew safety lease

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

The description contradicts the annotations. It describes renewing a control lease and preventing automatic output shutdown, which is an active side effect, while readOnlyHint=true declares the operation read-only. Per the rubric, any contradiction between description and annotations yields a score of 1, despite the description otherwise offering useful timeout and expiry 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?

Three concise sentences each add essential information: the lease renewal purpose and timeout, the no-op behavior, and the consequence of lease expiry. No filler or repetition.

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 tool with no output schema, the description is complete: it states the timeout, behavior when idle, when it is a no-op, and what happens on expiry. An agent has everything needed to decide when and why to call it, apart from the annotation contradiction noted above.

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?

There are zero parameters and the schema description coverage is 100%, so the baseline is 4. The description does not need to explain input semantics because there are no 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 clearly identifies the operation: renew the control lease with an explicit timeout of 20000ms to keep output enabled. This is specific and distinct from sibling tools, which focus on connect/disconnect, intensity, or waveform actions rather than lease renewal.

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?

The description states when to call this tool: while idle to keep output enabled, and that it is a no-op when no output is active. It does not explicitly name alternatives or exclusions, but no sibling tool fulfills this lease-renewal role, so the guidance is sufficient.

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