update_list_position
Update the position of a list on the board. Trello uses fractional indexing: each list has a float position, and to place a list between two others, use the average of their positions (e.g., between pos 1024 and 2048, use 1536). Use
This record as markdown: /tools/io-github-delorenj-mcp-server-trello/update-list-position.md
What update_list_position does on Trello
AI agents use update_list_position 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.
Why update_list_position is rated Medium
Repositioning a list on a Trello board is a reversible modification operation. It changes data state but does not execute arbitrary code, delete data irreversibly, or move money. The tool integrates with Trello's API to update a single attribute (position). Low severity because the impact is scoped to visual organization with no cascading destructive effects.
From the tool's definition Tool description states 'Update the position of a list on the board' — this modifies an existing list's position attribute reversibly without deleting or creating data.
Attacks that exploit this kind of access
The rule that runs update_list_position 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 update_list_position, this is the rule to start with:
update_list_position 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Trello, apply this rule, and every update_list_position call is checked against it from then on.
Questions about update_list_position
Update the position of a list on the board. Trello uses fractional indexing: each list has a float position, and to place a list between two others, use the average of their positions (e.g., between pos 1024 and 2048, use 1536). Use. 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.
Register the Trello MCP server in PolicyLayer and add a rule for update_list_position: 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.
update_list_position is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_list_position 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 update_list_position. 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.
update_list_position 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.
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