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

Annotations cover the safety profile (destructiveHint=false, idempotentHint=false, openWorldHint=true), so the bar is lower. The description still adds real behavioral value: 'cues hold' describes the state effect on the run and 'resume anytime' confirms reversibility, which is more than the annotations convey.

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?

One short sentence, front-loaded with the action and resource, with the parenthetical adding effect detail rather than filler. 'Cues hold' is slightly jargon-ish and could be clearer, but nothing 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?

An output schema exists, so return values need no explanation, and annotations carry the safety/idempotency profile. The description covers the action and its reversible state effect, leaving only minor gaps such as interaction with sibling tools.

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 is a single parameter with 100% schema description coverage, so the schema already documents execution_id fully. The description adds no format, source, or retrieval detail beyond that, making 3 the correct baseline.

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 verb (pause) plus resource (calibration) and a scope qualifier ('between trials') that distinguishes it from a hard stop. It does not explicitly name calibration.resume as the counterpart, though 'resume anytime' gestures at it.

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?

'Resume anytime' implies the resume path and that the action is reversible, which is implicit guidance on when this is appropriate. However, it never states when to prefer pause over execution.cancel or calibration.status, so usage is left to inference.

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