This record as markdown: /tools/karbassi-slack-mcp/subscriptions-thread-get.md
What subscriptions_thread_get does on Slack
AI agents call subscriptions_thread_get 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.
Why subscriptions_thread_get is rated Low
Despite the empty description limiting confidence, the naming convention strongly suggests this tool retrieves subscription thread data without modifying it. The '_get' suffix is a common pattern for read operations across APIs. In the context of Slack (a messaging/collaboration platform), retrieving thread subscription metadata poses minimal risk—it accesses existing data with no side effects.
From the tool's definition Tool name 'subscriptions_thread_get' indicates a getter/retrieval operation with no mutation verb (no create, update, delete, or execute keywords). The '_get' suffix is a strong indicator of read-only data retrieval.
Attacks that exploit this kind of access
The rule that runs subscriptions_thread_get 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 subscriptions_thread_get, this is the rule to start with:
subscriptions_thread_get is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Slack, apply this rule, and every subscriptions_thread_get call is checked against it from then on.
Questions about subscriptions_thread_get
subscriptions_thread_get is a read tool on the Slack MCP server. It is categorised as a Read tool in the Slack MCP Server, which means it retrieves data without modifying state.
Register the Slack MCP server in PolicyLayer and add a rule for subscriptions_thread_get: 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.
subscriptions_thread_get 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 subscriptions_thread_get 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 subscriptions_thread_get. 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.
subscriptions_thread_get 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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