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game_canvas_draw

Draw 2D shapes and text on a Godot canvas using line, rect, circle, polygon, and text actions. Clear the canvas as needed.

Instructions

2D drawing: line/rect/circle/polygon/text/clear

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
toNoEnd point {x,y}
fromNoStart point {x,y}
rectNoRectangle {x,y,w,h}
textNoText to draw
colorNoDraw color {r,g,b,a}
widthNoLine width. Default: 2
actionYesAction: line, rect, circle, polygon, text, clear
centerNoCenter point {x,y}
filledNoFill shape. Default: true
pointsNoPolygon points [{x,y},...]
radiusNoCircle radius
fontSizeNoText font size. Default: 16
positionNoText position {x,y} (baseline, for text)
parentPathNoParent node path for draw node
Behavior2/5

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

No annotations exist, so description must bear full burden. It does not disclose side effects (e.g., clearing screen with 'clear' action), coordinate system, or that it draws on a parent canvas node identified by parentPath. Parameter descriptions in schema help but overall behavioral context is missing.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence efficiently captures core purpose and lists actions. It is front-loaded. Could benefit from a bit more context without being verbose, but currently very concise.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 14 parameters and 6 actions, no output schema, and no annotations, the description is too sparse. It does not explain the overall workflow (e.g., need for parentPath, drawing behavior per action) or how parameters interact. Schema descriptions provide partial remedy, but overall completeness is low.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and parameter descriptions are clear. Description adds no additional semantics beyond listing actions; it does not clarify parameter relationships (e.g., from/to for line, points for polygon). Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description '2D drawing: line/rect/circle/polygon/text/clear' lists specific actions, clearly indicating the tool is for drawing shapes and text on a canvas. It distinguishes from sibling tools like game_canvas (which likely manages canvas nodes) and game_debug_draw (debug visualization) by enumerating primitives.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives such as game_canvas or game_debug_draw. The description does not mention prerequisites (e.g., needing a canvas node) or context for each action.

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

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