activate_persona · GalaxyMCP Server MCP: Risk & Policy

WHAT IT DOES

What activate_persona does on GalaxyMCP Server

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

WHY IT NEEDS A POLICY

Why activate_persona needs a policy

Activating a persona is a state-modifying operation that changes which personality/identity is in use, similar to switching user contexts or configurations. This is reversible (another persona can be activated), making it Write rather than Execute or Destructive.

From the tool's definition Tool description states 'Activate a specific persona by name or filename' — this modifies application state by switching the active persona, which affects subsequent operations and contexts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

activate_persona Rate-limited

activate_persona 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": {
    "activate_persona": {
      "limits": [
        {
          "counter": "activate_persona_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 GalaxyMCP Server, so you can run agents against it safely.

FAQ

Questions about activate_persona

What does the activate_persona tool do? +

Activate a specific persona by name or filename. It is categorised as a Write tool in the GalaxyMCP 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 activate_persona? +

Register the GalaxyMCP Server MCP server in PolicyLayer and add a rule for activate_persona: 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 GalaxyMCP Server. Nothing to install.

What risk level is activate_persona? +

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

Can I rate-limit activate_persona? +

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

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

activate_persona is provided by the GalaxyMCP Server MCP server (vaibhavkkk/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.