storage_presign_upload

A write tool on the MCP Framework Personal MCP server.

SERVERMCP Framework Personal SOURCEinggerman/mcps

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/inggerman-mcps/storage-presign-upload.md

WHAT IT DOES

What storage_presign_upload does on MCP Framework Personal

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

RISK

Why storage_presign_upload is rated Medium

The name implies generating a pre-signed upload URL, which facilitates writing/uploading data to storage. This is a Write operation as it enables data to be stored. Confidence is low because the description is empty, so the exact behavior is uncertain. Severity is high because misuse could allow unauthorized data to be uploaded to storage systems.

From the tool's definition Tool name 'storage_presign_upload' suggests generating a pre-signed URL for uploading data to storage.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs storage_presign_upload safely

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

storage_presign_upload Rate-limited

storage_presign_upload 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": {
    "storage_presign_upload": {
      "limits": [
        {
          "counter": "storage_presign_upload_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 MCP Framework Personal, apply this rule, and every storage_presign_upload call is checked against it from then on.

FAQ

Questions about storage_presign_upload

What does the storage_presign_upload tool do? +

storage_presign_upload is a write tool on the MCP Framework Personal MCP server. It is categorised as a Write tool in the MCP Framework Personal MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on storage_presign_upload? +

Register the MCP Framework Personal MCP server in PolicyLayer and add a rule for storage_presign_upload: 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 MCP Framework Personal. Nothing to install.

What risk level is storage_presign_upload? +

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

Can I rate-limit storage_presign_upload? +

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

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

storage_presign_upload is provided by the MCP Framework Personal MCP server (inggerman/mcps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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