set_fill_base_color

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

No annotations are provided, so the description carries the full behavioral burden, and it discloses almost nothing beyond the mutation implied by 'Set'. It does not say whether the prior color is overwritten irreversibly, what permissions or layer state are required, or what happens on an invalid UID.

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?

A single front-loaded sentence with zero filler; the target and both inputs appear immediately. It is efficient, though arguably too terse for a mutation tool with no annotations to lean on.

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?

An output schema exists, so return values need not be described, and the tool is a simple two-parameter setter. Still, with no annotations and no schema descriptions, the missing color range, preconditions, and overwrite semantics leave real gaps an agent would hit when calling it.

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 0% (only bare titles 'Uid' and 'Color'), so the description must compensate, and it does add real meaning: uid identifies the fill layer and color is an sRGB triple. It omits the critical detail missing from the schema: the numeric range/scale (0-1 vs 0-255) and whether the array must be exactly three elements.

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 specific verb and resource ('Set a Fill Layer's base color'), which is concrete enough to act on. It does not address how this relates to the overlapping sibling set_fill_parameters, which could plausibly also change fill color, so it stops short of full sibling differentiation.

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?

Usage is implied: you need an existing fill layer UID and want to change its base color specifically. There is no explicit when-to-use, no named alternative (e.g., set_fill_parameters for other fill settings), and no preconditions such as whether the layer must be selected or visible.

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