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

Annotations already declare this as read-only, idempotent, non-destructive, and closed-world. The description adds substantial behavioral context beyond those hints: the return object shape, status values, absence semantics, and the fact that an empty object means nothing is scheduled or reported anywhere.

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 front-loaded with the core purpose and cost tradeoff, then explains the return shape and filtering semantics, then names alternatives. Every sentence contributes operational information, with no redundant restatement of the title.

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?

Even without an output schema, the description fully explains what the returned object contains and how to interpret missing or empty results. Annotations cover the safety profile, and the description covers the rest needed to call and interpret the tool correctly.

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 tool has zero parameters, so there are no parameter semantics to explain. The description correctly notes that it takes no parameters, which is useful but minimal given the baseline for parameterless tools.

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 states a specific verb and resource: a fleet-wide maintenance status check keyed by printer id. It explicitly distinguishes itself from get_printer_maintenance_profile and list_maintenance_jobs, so an agent can identify the correct sibling without opening schemas.

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?

It names the tool as the cheapest fleet-wide check, explains that only printers with outstanding work appear, and directs the agent to get_printer_maintenance_profile for one printer or list_maintenance_jobs for job-level detail. This gives explicit when-to-use and alternative-selection guidance.

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