canvas_manage

列出本会话已关联画布（包括归档），或创建、关联、解除关联、设置默认、改名、归档、恢复和删除整张画布。归档/恢复/改名/删除必须来自用户明确指令并传 intent=explicit；删除保留运行中保护，不能用于绕过未决任务。

SERVERDutyDeck SOURCEtaokoplay/DutyDeck

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dutydeck/canvas-manage.md

WHAT IT DOES

What canvas_manage does on DutyDeck

AI agents use canvas_manage to create or update resources in DutyDeck, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your DutyDeck environment.

RISK

Why canvas_manage is rated Medium

An AI agent can call canvas_manage faster than any human can review: one bad instruction and it creates or modifies resources in DutyDeck by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs canvas_manage safely

PolicyLayer is an MCP gateway: it sits between your AI agents and DutyDeck, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For canvas_manage, this is the rule to start with:

canvas_manage Rate-limited

canvas_manage stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "canvas_manage": {
      "limits": [
        {
          "counter": "canvas_manage_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect DutyDeck, apply this rule, and every canvas_manage call is checked against it from then on.

FAQ

Questions about canvas_manage

What does the canvas_manage tool do? +

列出本会话已关联画布（包括归档），或创建、关联、解除关联、设置默认、改名、归档、恢复和删除整张画布。归档/恢复/改名/删除必须来自用户明确指令并传 intent=explicit；删除保留运行中保护，不能用于绕过未决任务。. It is categorised as a Write tool in the DutyDeck MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on canvas_manage? +

Register the DutyDeck MCP server in PolicyLayer and add a rule for canvas_manage: 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 DutyDeck. Nothing to install.

What risk level is canvas_manage? +

canvas_manage is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit canvas_manage? +

Yes. Add a rate_limit block to the canvas_manage 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.

How do I block canvas_manage completely? +

Set action: deny in the PolicyLayer policy for canvas_manage. 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.

What MCP server provides canvas_manage? +

canvas_manage is provided by the DutyDeck MCP server (taokoplay/DutyDeck). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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