Medium Risk

session

Manage conversation sessions for persistent context and memory

How to control session ↓

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

Medium Risk

This tool allows creation and modification of conversation sessions and their persistent state. While not destructive (sessions can typically be recreated), it performs reversible data modification operations.

From the tool's definition Tool description states 'Manage conversation sessions' which implies creating, modifying, or deleting session state and associated context/memory data. The verb 'manage' encompasses write operations.

Documented attack patterns abuse exactly the kind of access session gives an agent:

PolicyLayer is an MCP gateway — it sits between your AI agents and Ultra MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for session:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "session": {
      "limits": [
        {
          "counter": "session_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

session 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.

  1. Create a free account and register Ultra MCP — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Free to start. No card required.

Go deeper

What does the session tool do? +

Manage conversation sessions for persistent context and memory. It is categorised as a Write tool in the Ultra MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on session? +

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

What risk level is session? +

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

Can I rate-limit session? +

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

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

session is provided by the Ultra MCP server (realmikechong/ultra-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Ultra MCP tool call.

Deterministic rules across all 30 Ultra MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

Free to start. No card required.

30 Ultra MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

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