set_filament

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

No annotations are provided, so the description carries the behavioral burden; it does disclose mutation semantics: existing slot changes, a new slot number adds a slot, and empty fields are left unchanged. It omits whether non-empty fields overwrite without confirmation, how preset values are validated, persistence behavior, and any permission requirements.

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?

Two short sentences, front-loaded with the action and slot semantics. No redundant restatement of the schema or 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?

For a simple three-parameter setter, it covers the core add/update and leave-empty behavior. However, with no annotations, no output schema, and no schema descriptions, it still leaves validation, preset resolution, and result behavior unspecified.

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 description coverage is 0%, so the description adds needed meaning for slot (1-based, new value adds slot) and optional color/preset (empty keeps current). It does not specify color format (hex/name) or what preset strings refer to, leaving the optional parameters only partially explained.

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?

States a concrete verb ('Change') and resource ('filament slot'), and clarifies 1-based indexing plus add-on-new-slot behavior. It is distinguishable from set_object_filament by targeting filament slot definitions rather than object assignments, though it does not name that sibling explicitly.

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?

Explains the add-slot case and the partial-update convention, so an agent knows a new slot number creates one and empty fields preserve values. It does not say when to use this instead of filament_colors, ams_load, or set_object_filament, nor any prerequisites.

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