agent_session_create · DevFlow MCP Server MCP: Risk & Policy

WHAT IT DOES

What agent_session_create does on DevFlow MCP Server

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

WHY IT NEEDS A POLICY

Why agent_session_create needs a policy

The tool creates a new agent session, which is a reversible write operation. It does not execute arbitrary code, delete data, or move money. While it logs AI agent activity (which could have audit/governance implications in a workflow system), the core action is creating a tracking record.

From the tool's definition Tool name includes 'create' and description states 'Create a new agent session for a flow.' This is a write operation that creates a new record/session.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

agent_session_create Rate-limited

agent_session_create 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": {
    "agent_session_create": {
      "limits": [
        {
          "counter": "agent_session_create_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 DevFlow MCP Server, so you can run agents against it safely.

FAQ

Questions about agent_session_create

What does the agent_session_create tool do? +

Create a new agent session for a flow. An agent session tracks a unit of work performed by the AI agent. Use this at the start of a work session to log what you. It is categorised as a Write tool in the DevFlow 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 agent_session_create? +

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

What risk level is agent_session_create? +

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

Can I rate-limit agent_session_create? +

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

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

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