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

Annotations already mark the tool as destructive and non-idempotent. The description adds the concrete consequence of freeing the printer and the important boundary that running prints are unaffected, plus implicit safety by requiring a pending print. It could mention what happens to the canceled job's queue entry, but the core behavior is well disclosed.

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 concise sentences. The main action is front-loaded, and the exclusion and alternative are stated clearly with no wasted words.

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 cancellation tool with clear annotations and a schema that documents expected_job_uid's role, the description provides the necessary context for an agent to select and call the tool correctly. No output schema is present, but the description doesn't need to explain return values.

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?

Both parameters have schema descriptions, so the baseline is 3. The tool description itself adds no parameter information. The printer_id schema description is inconsistent (integer type but says comma-separated multiple IDs), which the description does not clarify, but per the baseline for high schema coverage, a 3 is appropriate.

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 explicitly states the tool cancels a print that has not started yet, with two specific waiting states (scheduled time or staggered start queue). It also explicitly distinguishes itself from cancel_print for already-running prints, which differentiates it from a sibling tool.

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 provides explicit when-to-use (for pending prints) and when-not-to-use (for running prints), and directly names the alternative tool (cancel_print). This leaves no ambiguity about selection.

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