mark_spool_empty

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

The description discloses one key side effect (clearing the printer assignment) beyond the name's implication, which is useful. However, with no annotations provided, it lacks details on reversibility, permissions, or impact on inventory state, leaving the full behavioral profile underspecified.

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?

The description is a single, direct sentence followed by an args list. Every element is necessary with no filler, making it efficiently front-loaded.

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?

The tool is simple and an output schema exists, so return values need not be explained. However, the description lacks usage context (e.g., when to mark a spool empty vs. archiving) and does not mention any prerequisites or edge cases, so it is minimally adequate but not rich.

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?

The description explains that spool_id is 'The ID of the spool to mark as empty', giving semantic meaning beyond the schema's bare 'integer' type. Since schema coverage is 0%, this compensation is necessary and sufficient for the single parameter.

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 states the action ('Mark a filament spool as empty') and the additional side effect ('clear its printer assignment'), using a specific verb and resource. This distinguishes it from sibling tools like open_spool or archive_spools, which have different purposes.

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 no guidance on when to use this tool versus alternatives. It does not mention alternatives, prerequisites, or typical scenarios, leaving the agent to infer usage solely from the name.

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