ledfx_set_effect

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

No annotations are provided, so the description must convey behavioral traits. It only states that effects control LED display, which is obvious. It does not disclose whether setting an effect replaces existing ones, requires specific permissions, or has rate limits. This is insufficient for a mutation tool.

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, well-structured sentence that conveys the core purpose and a usage tip without any fluff. It is appropriately sized and 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 description adequately covers the tool's purpose and distinguishes it from a sibling. Given the schema's good coverage and no output schema, it provides sufficient context for selecting and using the tool, though it could briefly mention the effect of the 'fallback' parameter or persistence behavior.

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 input schema already describes all four parameters with 100% coverage. The description adds no additional meaning to the parameters; it only provides a sibling reference. Therefore, the description meets the baseline but does not enhance parameter understanding.

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 sets an effect on a virtual (not a device), differentiates from 'ledfx_set_blender', and explains that effects control LED display. This provides a specific verb-resource-scope combination.

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 explicitly says 'NOT a device' and directs users to 'ledfx_set_blender' for blender effects. This gives clear context on when to use this tool and when to use an alternative, though it does not cover other potential exclusions.

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