send_wecom_image · WeCom Bot MCP Server MCP: Risk & Policy

WHAT IT DOES

What send_wecom_image does on WeCom Bot MCP Server

AI agents use send_wecom_image to create or update resources in WeCom Bot MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your WeCom Bot MCP Server environment.

WHY IT NEEDS A POLICY

Why send_wecom_image needs a policy

The tool sends image data through WeCom (Tencent's enterprise communication platform), modifying the message history and state of conversations. This is a Write operation because it creates new message records. Severity is medium because misuse could send unwanted/malicious images to users, cause reputational harm, or enable spam, but does not result in financial loss, data destruction, or code execution.

From the tool's definition Tool name 'send_wecom_image' combined with sibling tools 'send_message', 'send_wecom_file', and 'send_wecom_template_card_*' which are all message-sending operations. The server description explicitly states it is 'for sending messages via WeCom bots'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_wecom_image Rate-limited

send_wecom_image 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": {
    "send_wecom_image": {
      "limits": [
        {
          "counter": "send_wecom_image_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches WeCom Bot MCP Server, so you can run agents against it safely.

FAQ

Questions about send_wecom_image

What does the send_wecom_image tool do? +

send_wecom_image. It is categorised as a Write tool in the WeCom Bot MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on send_wecom_image? +

Register the WeCom Bot MCP Server MCP server in PolicyLayer and add a rule for send_wecom_image: 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 WeCom Bot MCP Server. Nothing to install.

What risk level is send_wecom_image? +

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

Can I rate-limit send_wecom_image? +

Yes. Add a rate_limit block to the send_wecom_image 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 send_wecom_image completely? +

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

send_wecom_image is provided by the WeCom Bot MCP Server MCP server (loonghao/wecom-bot-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.