mittwald_context_set_session · Mittwald MCP Server MCP

WHAT IT DOES

What mittwald_context_set_session does on Mittwald MCP Server

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

WHY IT NEEDS A POLICY

Why mittwald_context_set_session needs a policy

This tool modifies session state in Redis rather than merely retrieving it. While not destructive (changes are reversible), it creates or updates session context data. The description explicitly mentions 'Set' and 'session' which indicates Write operations.

From the tool's definition Tool description states 'Set user context in Redis session' which modifies session data. The sibling tools include create/update operations (mittwald_app_create_node, mittwald_app_create_php, mittwald_app_dependency_update) indicating a Write-oriented…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mittwald_context_set_session Rate-limited

mittwald_context_set_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mittwald_context_set_session": {
      "limits": [
        {
          "counter": "mittwald_context_set_session_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 Mittwald MCP Server, so you can run agents against it safely.

FAQ

Questions about mittwald_context_set_session

What does the mittwald_context_set_session tool do? +

Set user context in Redis session (session-aware, multi-tenant safe). It is categorised as a Write tool in the Mittwald 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 mittwald_context_set_session? +

Register the Mittwald MCP Server MCP server in PolicyLayer and add a rule for mittwald_context_set_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 Mittwald MCP Server. Nothing to install.

What risk level is mittwald_context_set_session? +

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

Can I rate-limit mittwald_context_set_session? +

Yes. Add a rate_limit block to the mittwald_context_set_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 mittwald_context_set_session completely? +

Set action: deny in the PolicyLayer policy for mittwald_context_set_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 mittwald_context_set_session? +

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