Adds a new custom board background, from an image file, to a specified Trello member's collection, making it available for their use but not applying it to any board.
Accepts file system path (file)
Part of the Trello MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER to create or modify resources in Trello. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Trello.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Trello policy for all 200 tools.
Agents calling write-class tools like TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Adds a new custom board background, from an image file, to a specified Trello member's collection, making it available for their use but not applying it to any board.. 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.
Add a rule in your Intercept YAML policy under the tools section for TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Trello MCP server.
TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER 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 TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER rule in your Intercept 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 Intercept policy for TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER. 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.
TRELLO_ADD_MEMBERS_BOARD_BACKGROUNDS_BY_ID_MEMBER is provided by the Trello MCP server (mcp-server-trello). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept