canvas_get_image_candidates

查询精确批次的候选状态与选择指纹；可指定最多四个节点读取候选缩略图进行视觉检查，未指定则只返回状态。

SERVERDutyDeck SOURCEtaokoplay/DutyDeck

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dutydeck/canvas-get-image-candidates.md

WHAT IT DOES

What canvas_get_image_candidates does on DutyDeck

AI agents call canvas_get_image_candidates to retrieve information from DutyDeck without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why canvas_get_image_candidates is rated Low

Even though canvas_get_image_candidates only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs canvas_get_image_candidates 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_get_image_candidates, this is the rule to start with:

canvas_get_image_candidates Allowed

canvas_get_image_candidates is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "canvas_get_image_candidates": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about canvas_get_image_candidates

What does the canvas_get_image_candidates tool do? +

查询精确批次的候选状态与选择指纹；可指定最多四个节点读取候选缩略图进行视觉检查，未指定则只返回状态。. It is categorised as a Read tool in the DutyDeck MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on canvas_get_image_candidates? +

Register the DutyDeck MCP server in PolicyLayer and add a rule for canvas_get_image_candidates: 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_get_image_candidates? +

canvas_get_image_candidates is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit canvas_get_image_candidates? +

Yes. Add a rate_limit block to the canvas_get_image_candidates 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_get_image_candidates completely? +

Set action: deny in the PolicyLayer policy for canvas_get_image_candidates. 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_get_image_candidates? +

canvas_get_image_candidates 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.

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