send_slack_message

SERVERFreedom Mcp SOURCEhttps://twuluxmoognlwtmaoqgo.supabase.co/functions/v1/freedom-mcp

Medium RISK CLASS

Category Write

Parameters 52 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-getfreedomos-freedom-mcp/send-slack-message.md

WHAT IT DOES

What send_slack_message does on Freedom Mcp

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

Parameter	Type	Required	Description
`message`	string	Yes	The message text to send (supports Slack markdown: bold, _italic_, etc.)
`companyId`	string	Yes	FreedomOS company id to act within (you must be a member). Required for company-scoped tools.
`thread_ts`	string	—	Optional thread timestamp to reply in a thread
`channel_name`	string	—	Slack channel name to post to (without #), e.g., "general", "engineering". Use this OR recipient_name, not both.
`recipient_name`	string	—	Name of the person to DM (e.g., "Alex", "Jordan"). Will be looked up via linked accounts or Slack directory.

Parameters from the server's own tool schema.

RISK

Why send_slack_message is rated Medium

The tool creates (writes) new messages in Slack, which are reversible through Slack's native delete/edit functions. This is Write rather than Execute because it performs a communication action without triggering external code or systems. It is not Destructive because messages can be edited or deleted.

From the tool's definition Tool sends messages to Slack channels or direct messages to team members. Description explicitly states: 'Send a message to a Slack channel or direct message to a team member.' This creates new communication artifacts that persist in Slack.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs send_slack_message safely

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

send_slack_message Rate-limited

send_slack_message 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": {
    "send_slack_message": {
      "limits": [
        {
          "counter": "send_slack_message_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 Freedom Mcp, apply this rule, and every send_slack_message call is checked against it from then on.

FAQ

Questions about send_slack_message

What does the send_slack_message tool do? +

Send a message to a Slack channel or direct message to a team member. Use when user asks to "message X on Slack", "send a Slack message", "DM someone on Slack", "post to #channel", etc. [outbound-tier — EVERY call needs a manager's approval (per-send human rail): each request queues its own approval card and sends exactly once on approve. There is no standing grant for this tool.]. It is categorised as a Write tool in the Freedom Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does send_slack_message accept? +

send_slack_message accepts 5 parameters: message, companyId, thread_ts, channel_name, recipient_name. Required: message, companyId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on send_slack_message? +

Register the Freedom MCP server in PolicyLayer and add a rule for send_slack_message: 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 Freedom Mcp. Nothing to install.

What risk level is send_slack_message? +

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

Can I rate-limit send_slack_message? +

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

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

send_slack_message is provided by the Freedom MCP server (https://twuluxmoognlwtmaoqgo.supabase.co/functions/v1/freedom-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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