get_slack_users
AI agents call get_slack_users to retrieve information from Slack MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get_' prefix and naming pattern strongly suggest this retrieves user information from Slack without side effects. No write, delete, execute, or financial operations are implied. This is a standard read operation with minimal risk—user lists are typically non-sensitive metadata in Slack workspaces.
From the tool's definition Tool name 'get_slack_users' with prefix 'get_' indicates data retrieval. Empty description prevents full assessment, but consistent with sibling read tools like 'get_file_preview', 'get_slack_channel_history', 'get_slack_channels', 'get_workspace_info', and…
Attacks that exploit this kind of access
get_slack_users. It is categorised as a Read tool in the Slack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Slack MCP Server MCP server in PolicyLayer and add a rule for get_slack_users: 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 MCP Server. Nothing to install.
get_slack_users is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_slack_users 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.
Set action: deny in the PolicyLayer policy for get_slack_users. 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.
get_slack_users is provided by the Slack MCP Server MCP server (yeoamlog/slack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_slack_users is one line of Slack MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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