Listar grupos privados que o usuário participa
AI agents call get_private_channels_with_user 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.
This tool queries and returns information about private channels a user is a member of. It performs data retrieval only, matching the Read category pattern. Severity is low because listing channel membership is informational access without capability to modify, delete, or execute operations. Confidence is high due to clear 'get_' naming convention and list/retrieval semantics in the description.
From the tool's definition Tool name contains 'get_' prefix and description states 'Listar grupos privados que o usuário participa' (List private groups the user participates in). This is a retrieval operation with no side effects.
Attacks that exploit this kind of access
Listar grupos privados que o usuário participa. 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_private_channels_with_user: 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_private_channels_with_user 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_private_channels_with_user 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_private_channels_with_user. 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_private_channels_with_user is provided by the Slack MCP Server MCP server (will2023a/mcp-slack). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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