publish_photo · Fanfou MCP: Risk & Policy

WHAT IT DOES

What publish_photo does on Fanfou

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

WHY IT NEEDS A POLICY

Why publish_photo needs a policy

The tool creates or publishes user-generated photo content on a social media platform, which is a reversible Write operation. It does not delete data (Destructive), execute arbitrary code (Execute), involve financial transactions (Financial), or retrieve data (Read).

From the tool's definition Tool name 'publish_photo' indicates creating/uploading photo content. Server context shows this is a Fanfou (Chinese microblogging platform) MCP with content management tools including 'publish_status' and 'manage_favorite', confirming a Write-oriented…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

publish_photo Rate-limited

publish_photo 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": {
    "publish_photo": {
      "limits": [
        {
          "counter": "publish_photo_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 Fanfou, so you can run agents against it safely.

FAQ

Questions about publish_photo

What does the publish_photo tool do? +

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

How do I enforce a policy on publish_photo? +

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

What risk level is publish_photo? +

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

Can I rate-limit publish_photo? +

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

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

publish_photo is provided by the Fanfou MCP server (kingcos/fanfou-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.