set_active_board

Set the active board for future operations

SERVERTrello SOURCE@delorenj/mcp-server-trello

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-delorenj-mcp-server-trello/set-active-board.md

WHAT IT DOES

What set_active_board does on Trello

AI agents use set_active_board to create or update resources in Trello, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Trello environment.

RISK

Why set_active_board is rated Medium

This tool modifies the internal state of the MCP server by selecting which Trello board is the target for subsequent operations. While not destructive or irreversible, it is a state-altering action that could cause unintended side effects if an AI agent sets the wrong board, leading to operations performed on the wrong board.

From the tool's definition Tool name 'set_active_board' and description 'Set the active board for future operations' indicate modification of application state that persists across operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_active_board safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Trello, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_active_board, this is the rule to start with:

set_active_board Rate-limited

set_active_board stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_active_board": {
      "limits": [
        {
          "counter": "set_active_board_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Trello, apply this rule, and every set_active_board call is checked against it from then on.

FAQ

Questions about set_active_board

What does the set_active_board tool do? +

Set the active board for future operations. It is categorised as a Write tool in the Trello MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_active_board? +

Register the Trello MCP server in PolicyLayer and add a rule for set_active_board: 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.

What risk level is set_active_board? +

set_active_board is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit set_active_board? +

Yes. Add a rate_limit block to the set_active_board 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.

How do I block set_active_board completely? +

Set action: deny in the PolicyLayer policy for set_active_board. 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.

What MCP server provides set_active_board? +

set_active_board is provided by the Trello MCP server (@delorenj/mcp-server-trello). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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