Use this tool to create a new contact in Intercom or update an existing one. Call it when a new user signs up and you need to register them, or when you need to update a contact
AI agents use create_or_update_contact to create or update resources in Intercom MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Intercom MCP Server environment.
This tool creates or modifies contact records, which are Write category operations. Severity is medium because misuse could result in incorrect customer data being registered or modified (e.g., updating wrong contact details, creating duplicate contacts, corrupting customer information), but these changes are typically reversible through subsequent updates or deletions by authorized users.
From the tool's definition Tool description explicitly states 'create a new contact' and 'update an existing one', which are reversible write operations. The tool modifies contact data in Intercom CRM.
Attacks that exploit this kind of access
Use this tool to create a new contact in Intercom or update an existing one. Call it when a new user signs up and you need to register them, or when you need to update a contact. It is categorised as a Write tool in the Intercom MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Intercom MCP Server MCP server in PolicyLayer and add a rule for create_or_update_contact: 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 Intercom MCP Server. Nothing to install.
create_or_update_contact 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 create_or_update_contact 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 create_or_update_contact. 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.
create_or_update_contact is provided by the Intercom MCP Server MCP server (shackletonanalytics/intercom-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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