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

No annotations are provided, so the description carries the full burden. It indicates mutation via 'Update' and specifies the roaming task context, but fails to disclose valid color values (string|null is ambiguous), error behavior for missing tasks, or whether updates are immediate.

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 single sentence is front-loaded and contains no redundant words. However, it is arguably too concise given the lack of schema coverage and annotations, leaving necessary context undocumented.

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 mutation tool with 2 parameters and 0% schema coverage, the description is insufficient. It fails to specify valid color input values, explain the null default behavior, or describe what confirms a successful update (no output schema exists to compensate).

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?

With 0% schema description coverage, the description partially compensates by identifying 'color' as a 'mode' and 'task_id' as referring to an 'existing roaming task'. However, it omits valid color enumerations or formats (e.g., 'color' vs 'monochrome'), which is critical given the lack of schema documentation.

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 verb (Update) and resource (color mode for an existing roaming task). It distinguishes from siblings like update_printer_copies by specifying 'roaming task' rather than printer hardware, and links to create_roaming_task.

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?

While 'existing roaming task' implies a prerequisite (likely created via create_roaming_task), there is no explicit when-to-use guidance or differentiation from other update_printer_* siblings. No mention of what constitutes valid color values.

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