Reposition an existing item to a new (x, y) without retyping its content. Works for every item kind: text and link set the top-left to (x, y); line translates every point so the stroke's bounding box top-left lands at (x, y); image sets the top-left like text. kind defaults to text for backward c...
Risk signalsBulk/mass operation — affects multiple targets
Part of the Cnvs App server.
Free to start. No card required.
AI agents use move to create or modify resources in Cnvs App. 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 move 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 Cnvs App.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"move": {
"limits": [
{
"counter": "move_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Cnvs App policy for all 10 tools.
These attack patterns abuse exactly the kind of access move 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.
Reposition an existing item to a new (x, y) without retyping its content. Works for every item kind: text and link set the top-left to (x, y); line translates every point so the stroke's bounding box top-left lands at (x, y); image sets the top-left like text. kind defaults to text for backward compat with older callers. Find the id + kind via get_board. Prefer move over re-creating an item when only the location changes — it preserves the id, content, author and avoids a round-trip of base64 bytes for images.. It is categorised as a Write tool in the Cnvs App MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Cnvs App MCP server in PolicyLayer and add a rule for move: 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 Cnvs App. Nothing to install.
move 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 move 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 move. 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.
move is provided by the Cnvs App MCP server (https://cnvs.app/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Cnvs App tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.