crm_update_contact

Update an existing contact with validated properties

SERVERHubSpot MCP SOURCEblacksand-software/hubspot-mcp

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/blacksand-software-hubspot-mcp/crm-update-contact.md

WHAT IT DOES

What crm_update_contact does on HubSpot MCP

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

RISK

Why crm_update_contact is rated Medium

The tool modifies existing contact records but does not delete data (which would be Destructive) and does not involve financial transactions (which would be Financial). It is Write-category because it creates or modifies data reversibly.

From the tool's definition Tool name explicitly contains 'update', and description states 'Update an existing contact with validated properties'. This is a reversible modification of data in the HubSpot CRM system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crm_update_contact safely

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

crm_update_contact Rate-limited

crm_update_contact 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": {
    "crm_update_contact": {
      "limits": [
        {
          "counter": "crm_update_contact_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 HubSpot MCP, apply this rule, and every crm_update_contact call is checked against it from then on.

FAQ

Questions about crm_update_contact

What does the crm_update_contact tool do? +

Update an existing contact with validated properties. It is categorised as a Write tool in the HubSpot MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on crm_update_contact? +

Register the HubSpot MCP server in PolicyLayer and add a rule for crm_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 HubSpot MCP. Nothing to install.

What risk level is crm_update_contact? +

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

Can I rate-limit crm_update_contact? +

Yes. Add a rate_limit block to the crm_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.

How do I block crm_update_contact completely? +

Set action: deny in the PolicyLayer policy for crm_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.

What MCP server provides crm_update_contact? +

crm_update_contact is provided by the HubSpot MCP server (blacksand-software/hubspot-mcp). 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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