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

With no annotations, the description carries the full behavioral burden, and it does disclose two real traits: the physical side effect (a print job is dispatched) and that the printer is fixed to the organisation default rather than selectable. It stops short of stating permission needs, failure behavior, or whether a new print job is created on each call.

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?

A single front-loaded sentence with no filler and no repetition of the schema. It is efficient, though slightly terse given the operation it performs.

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 two-parameter, no-output-schema tool, the description covers the core action but leaves gaps an agent would care about: what 'again' presupposes about prior label state, whether the labelId is a usage id versus a label id, and what happens if no default printer or PrintNode connection exists.

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 100% with only two parameters, so the schema already documents labelId and intentId. The description adds no meaning beyond what the schema provides; baseline 3 applies.

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 and resource: sending/re-sending a label print job to PrintNode via the organisation default printer. An agent can tell this is a print-dispatch action rather than a label lookup or remake. It does not explicitly distinguish itself from lookalikes such as RemakeLabel or DownloadLabel, which would warrant a 5.

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 word 'again' implies this is for re-printing an existing label, which is useful implied guidance. However, there is no explicit when-to-use framing and no routing to alternatives like RemakeLabel or DownloadLabel, so the agent must infer the context.

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