store_files

Store uploaded files. Receives file objects with name, size, type, data (base64).

SERVERAgent Jail SOURCEidiscoord13-sketch/agent-jail-mcp

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/agent-jail-mcp/store-files.md

WHAT IT DOES

What store_files does on Agent Jail

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

RISK

Why store_files is rated Medium

The tool creates/stores new files on the server by accepting uploaded file objects with base64-encoded data. This is a write operation (creating data), reversible in principle (files could be deleted), with medium severity as it could be misused to store malicious content or large amounts of data.

From the tool's definition 'Store uploaded files. Receives file objects with name, size, type, data (base64).'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs store_files safely

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

store_files Rate-limited

store_files 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": {
    "store_files": {
      "limits": [
        {
          "counter": "store_files_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 Agent Jail, apply this rule, and every store_files call is checked against it from then on.

FAQ

Questions about store_files

What does the store_files tool do? +

Store uploaded files. Receives file objects with name, size, type, data (base64). It is categorised as a Write tool in the Agent Jail MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on store_files? +

Register the Agent Jail MCP server in PolicyLayer and add a rule for store_files: 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 Agent Jail. Nothing to install.

What risk level is store_files? +

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

Can I rate-limit store_files? +

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

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

store_files is provided by the Agent Jail MCP server (idiscoord13-sketch/agent-jail-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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