Download a group chat's icon as base64-encoded image data.
AI agents call get_group_icon to retrieve information from Bluebubbles without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves an image asset associated with a group chat and returns it as base64-encoded data. It has no side effects—it does not modify, create, delete, or execute any operations. The worst-case misuse would be unauthorized viewing of group chat icons, which is a data exposure risk but not severe given the data involved (a chat icon, not messages or sensitive content). Classified as Read with low severity.
From the tool's definition Tool name 'get_group_icon' and description 'Download a group chat's icon as base64-encoded image data' indicates retrieval of existing data with no modification, creation, or deletion. 'Download' is a read operation that retrieves and returns data.
Attacks that exploit this kind of access
Download a group chat's icon as base64-encoded image data. It is categorised as a Read tool in the Bluebubbles MCP Server, which means it retrieves data without modifying state.
Register the Bluebubbles MCP server in PolicyLayer and add a rule for get_group_icon: 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 Bluebubbles. Nothing to install.
get_group_icon 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_group_icon 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_group_icon. 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_group_icon is provided by the Bluebubbles MCP server (metaember/bluebubbles-mcp). 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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