set-session-data

Store data in the session

SERVERFrontmcp SOURCEagentfront/frontmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/frontmcp/set-session-data.md

WHAT IT DOES

What set-session-data does on Frontmcp

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

RISK

Why set-session-data is rated Medium

This tool writes data to a session object, which is a reversible operation. While session data modification could affect subsequent requests or expose sensitive information if misused, it does not permanently delete data (not Destructive), move money (not Financial), or execute arbitrary code (not Execute).

From the tool's definition Tool name contains 'set' and description states 'Store data in the session', indicating the tool creates or modifies session-scoped data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set-session-data safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Frontmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set-session-data, this is the rule to start with:

set-session-data Rate-limited

set-session-data 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": {
    "set-session-data": {
      "limits": [
        {
          "counter": "set-session-data_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Frontmcp, apply this rule, and every set-session-data call is checked against it from then on.

FAQ

Questions about set-session-data

What does the set-session-data tool do? +

Store data in the session. It is categorised as a Write tool in the Frontmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set-session-data? +

Register the Front MCP server in PolicyLayer and add a rule for set-session-data: 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 Frontmcp. Nothing to install.

What risk level is set-session-data? +

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

Can I rate-limit set-session-data? +

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

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

set-session-data is provided by the Front MCP server (agentfront/frontmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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