files_favorites_list

List a user's favorited (starred/saved) files (undocumented).

SERVERSlack SOURCEkarbassi/slack-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/karbassi-slack-mcp/files-favorites-list.md

WHAT IT DOES

What files_favorites_list does on Slack

AI agents call files_favorites_list to retrieve information from Slack without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why files_favorites_list is rated Low

This tool retrieves and enumerates a user's favorited files from Slack. It performs a query operation that has no side effects—it does not create, modify, delete, or execute any actions. The 'list' verb and passive data retrieval nature clearly place it in the Read category.

From the tool's definition Tool name 'files_favorites_list' and description 'List a user's favorited (starred/saved) files' indicates retrieval of existing data without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs files_favorites_list safely

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

files_favorites_list Allowed

files_favorites_list is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "files_favorites_list": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Slack, apply this rule, and every files_favorites_list call is checked against it from then on.

FAQ

Questions about files_favorites_list

What does the files_favorites_list tool do? +

List a user's favorited (starred/saved) files (undocumented). It is categorised as a Read tool in the Slack MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on files_favorites_list? +

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

What risk level is files_favorites_list? +

files_favorites_list is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit files_favorites_list? +

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

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

files_favorites_list is provided by the Slack MCP server (karbassi/slack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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