device

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 mentions "on demand" loading for modules but fails to disclose side effects, permission requirements, or what happens to the system when enabling/disabling modules. Basic transparency is present but insufficient for a tool with 8 actions.

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 sentence with two clear clauses, front-loading the high-level purpose. Every part earns its place, and the structure immediately communicates the tool's scope without redundancy.

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 has no output schema, and the description does not explain return values or error conditions. Given the complexity (6 parameters, 8 actions), the description is incomplete for an agent to fully understand the tool's behavior and expectations.

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 coverage is high (83%), with parameter descriptions already present. The description adds meaning by grouping actions and implying which parameters apply to which group (e.g., deviceId for set, platform for list/set_target, module for enable_module/disable_module). This helps contextualize the parameter usage beyond the schema.

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 tool handles "Device management + module loading" and then groups the actions into two categories: "list/set/set_target/get_target: devices" and "enable_module/disable_module/list_modules: load browser/desktop/store tools on demand." This provides a specific verb-resource mapping and distinguishes from sibling tools like app, flow, or input.

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 implies when to use each group of actions (device operations vs. module loading) but does not explicitly state when not to use this tool or provide alternatives among siblings. It gives clear context but lacks exclusionary guidance.

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