maintain_storage · Chronicle MCP: Risk & Policy

WHAT IT DOES

What maintain_storage does on Chronicle MCP

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

WHY IT NEEDS A POLICY

Why maintain_storage needs a policy

Compression and deduplication alter how data is stored and organized but do not delete underlying records irreversibly. Configuration changes adjust system behavior but remain reversible. These are Write operations rather than Destructive because they do not permanently erase data.

From the tool's definition Tool performs 'compress', 'deduplicate', 'configure' operations on storage—these are data modification actions. 'Capabilities' retrieval is read-only, but the primary operations (compress, deduplicate, configure) reversibly modify stored data and system state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

maintain_storage Rate-limited

maintain_storage 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": {
    "maintain_storage": {
      "limits": [
        {
          "counter": "maintain_storage_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 Chronicle MCP, so you can run agents against it safely.

FAQ

Questions about maintain_storage

What does the maintain_storage tool do? +

Perform storage maintenance, deduplication, configuration, and capabilities retrieval. Options for op_type: 'compress', 'deduplicate', 'configure', 'capabilities'. It is categorised as a Write tool in the Chronicle 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 maintain_storage? +

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

What risk level is maintain_storage? +

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

Can I rate-limit maintain_storage? +

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

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

maintain_storage is provided by the Chronicle MCP server (pypi:chronicle-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.