Get all members of a board. Use this tool to see who has access to a board.
AI agents call get_board_members to retrieve information from Trello without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves membership information from a Trello board without creating, modifying, deleting, or executing any actions. It is a straightforward read operation with minimal security risk—the information returned is typically visible to board members already, and querying it does not change board state or trigger external operations.
From the tool's definition Tool name is 'get_board_members' and description states 'Get all members of a board. Use this tool to see who has access to a board.' The verb 'Get' and phrase 'see who has access' indicate data retrieval with no modification or side effects.
Documented attack patterns abuse exactly the kind of access get_board_members gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Trello, and nothing reaches the server without passing your rules. This is the rule we recommend for get_board_members:
{
"version": "1",
"default": "deny",
"tools": {
"get_board_members": {}
}
}get_board_members is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get all members of a board. Use this tool to see who has access to a board. It is categorised as a Read tool in the Trello MCP Server, which means it retrieves data without modifying state.
Register the Trello MCP server in PolicyLayer and add a rule for get_board_members: 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 Trello. Nothing to install.
get_board_members 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_board_members 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_board_members. 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_board_members is provided by the Trello MCP server (v4lheru/trello-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Trello, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
76 Trello tools catalogued and risk-classified — across an index of 43,000+ MCP servers.