mixpost_update_tag · Mixpost MCP: Risk & Policy

WHAT IT DOES

What mixpost_update_tag does on Mixpost

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

WHY IT NEEDS A POLICY

Why mixpost_update_tag needs a policy

The tool modifies an existing tag, which is a reversible change to data. This falls under the Write category as it creates or modifies data reversibly. Severity is medium because misconfiguration of tags could affect social media organization and campaign management, but the impact is limited in scope and reversible. Confidence is high based on clear, explicit language indicating a modification operation.

From the tool's definition Tool name 'mixpost_update_tag' and description 'Update an existing tag' indicate modification of existing data without deletion or irreversible destruction.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mixpost_update_tag Rate-limited

mixpost_update_tag 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": {
    "mixpost_update_tag": {
      "limits": [
        {
          "counter": "mixpost_update_tag_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 Mixpost, so you can run agents against it safely.

FAQ

Questions about mixpost_update_tag

What does the mixpost_update_tag tool do? +

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

How do I enforce a policy on mixpost_update_tag? +

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

What risk level is mixpost_update_tag? +

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

Can I rate-limit mixpost_update_tag? +

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

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

mixpost_update_tag is provided by the Mixpost MCP server (pfarag/mixpost-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.