List all Trello workspaces accessible to the user.
AI agents call list_workspaces to retrieve information from Mcp Trello without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that retrieves workspace information. It has no capability to modify, delete, or execute actions on the workspaces. The blast radius if misused by an AI agent is minimal—it only exposes information about existing workspaces the user already has access to. Therefore, it is classified as Read with low severity.
From the tool's definition Tool name is 'list_workspaces' and description states 'List all Trello workspaces accessible to the user.' The verb 'list' and the function 'list all' indicate a query operation that retrieves data without modification or side effects.
Attacks that exploit this kind of access
List all Trello workspaces accessible to the user. It is categorised as a Read tool in the Mcp Trello MCP Server, which means it retrieves data without modifying state.
Register the Mcp Trello MCP server in PolicyLayer and add a rule for list_workspaces: 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 Mcp Trello. Nothing to install.
list_workspaces 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 list_workspaces 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 list_workspaces. 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.
list_workspaces is provided by the Mcp Trello MCP server (mbeauv/mcp-trello). 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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