AI agents call sprout_list_tags to retrieve information from Sprout without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing tags/labels/campaigns without creating, modifying, deleting, or executing any operations. It is purely informational and poses minimal risk if misused by an AI agent, as it only exposes metadata about existing organizational structures.
From the tool's definition Tool name 'list_tags' and description 'List message tags (labels and campaigns, active and archived)' indicate a retrieval operation with no side effects. The verb 'list' and the word 'list' in the tool name confirm this is a query operation.
Attacks that exploit this kind of access
List message tags (labels and campaigns, active and archived). It is categorised as a Read tool in the Sprout MCP Server, which means it retrieves data without modifying state.
Register the Sprout MCP server in PolicyLayer and add a rule for sprout_list_tags: 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 Sprout. Nothing to install.
sprout_list_tags 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 sprout_list_tags 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 sprout_list_tags. 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.
sprout_list_tags is provided by the Sprout MCP server (@oliverames/sprout-mcp-server). 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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