UpdateOneNote
A write tool on the Twenty MCP server.
This record as markdown: /tools/jdu278-twenty-mcp-server/updateonenote.md
What UpdateOneNote does on Twenty MCP Server
AI agents use UpdateOneNote to create or update resources in Twenty MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Twenty MCP Server environment.
Why UpdateOneNote is rated Medium
This tool modifies existing CRM data (a note) but does not delete it irreversibly, execute arbitrary code, or trigger financial transactions. The update is reversible through subsequent edits. Given the CRM context where notes may contain business-critical information (contacts, tasks, follow-ups), unauthorized modification could impact business operations, warranting medium severity.
From the tool's definition UpdateOneNote updates a note in the Twenty CRM system. The verb 'Update' and the singular 'One' indicate reversible modification of existing data, not deletion or execution of external operations.
Attacks that exploit this kind of access
The rule that runs UpdateOneNote safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Twenty MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For UpdateOneNote, this is the rule to start with:
UpdateOneNote 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 Twenty MCP Server, apply this rule, and every UpdateOneNote call is checked against it from then on.
Questions about UpdateOneNote
UpdateOneNote is a write tool on the Twenty MCP Server MCP server. It is categorised as a Write tool in the Twenty MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Twenty MCP Server MCP server in PolicyLayer and add a rule for UpdateOneNote: 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 Twenty MCP Server. Nothing to install.
UpdateOneNote 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 UpdateOneNote 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 UpdateOneNote. 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.
UpdateOneNote is provided by the Twenty MCP Server MCP server (jdu278/twenty-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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