Generate a new drawing canvas with specified width and height.
Part of the Drawing Tool for AI Assistants server.
Free to start. No card required.
AI agents use drawing_generateCanvas to create or modify resources in Drawing Tool for AI Assistants. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call drawing_generateCanvas repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Drawing Tool for AI Assistants.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"drawing_generateCanvas": {
"limits": [
{
"counter": "drawing_generatecanvas_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Drawing Tool for AI Assistants policy for all 4 tools.
These attack patterns abuse exactly the kind of access drawing_generateCanvas gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Generate a new drawing canvas with specified width and height.. It is categorised as a Write tool in the Drawing Tool for AI Assistants MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Drawing Tool for AI Assistants MCP server in PolicyLayer and add a rule for drawing_generateCanvas: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Drawing Tool for AI Assistants. Nothing to install.
drawing_generateCanvas is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the drawing_generateCanvas rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for drawing_generateCanvas. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
drawing_generateCanvas is provided by the Drawing Tool for AI Assistants MCP server (flrngel/mcp-painter). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 Drawing Tool for AI Assistants tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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