slack_upload_file

A write tool on the Integrations MCP server.

SERVERIntegrations MCP SOURCEshriram-vasudevan/integrations-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/shriram-vasudevan-integrations-mcp/slack-upload-file.md

WHAT IT DOES

What slack_upload_file does on Integrations MCP

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

RISK

Why slack_upload_file is rated Medium

File uploads are Write operations—they create or add data reversibly. An AI agent could upload sensitive files, malware, or spam to a Slack workspace, affecting all members and cluttering shared spaces. The action is reversible (files can be deleted), so it is not Destructive.

From the tool's definition Tool name is 'slack_upload_file', which uploads a file to Slack. This creates new data (file content) in a workspace.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs slack_upload_file safely

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

slack_upload_file Rate-limited

slack_upload_file 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": {
    "slack_upload_file": {
      "limits": [
        {
          "counter": "slack_upload_file_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 Integrations MCP, apply this rule, and every slack_upload_file call is checked against it from then on.

FAQ

Questions about slack_upload_file

What does the slack_upload_file tool do? +

slack_upload_file is a write tool on the Integrations MCP server. It is categorised as a Write tool in the Integrations 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 slack_upload_file? +

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

What risk level is slack_upload_file? +

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

Can I rate-limit slack_upload_file? +

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

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

slack_upload_file is provided by the Integrations MCP server (shriram-vasudevan/integrations-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Integrations, and thousands of servers like it.

This server

All 420 Integrations tools →

Across the catalogue

write_file on 0sec → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →