update_gtm_variable

Update an existing variable in a GTM workspace IN PLACE. Read-modify-write: the current variable is fetched and only the fields you pass are overlaid, with

SERVERSamarth Gtm Mcp SOURCEsamarth-gtm-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/io-github-samarthanalytics-sj-samarth-gtm-mcp/update-gtm-variable.md

WHAT IT DOES

What update_gtm_variable does on Samarth Gtm Mcp

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

RISK

Why update_gtm_variable is rated Medium

Modifies GTM configuration reversibly; high blast radius if misconfigured tracking variables affect analytics or marketing operations.

From the tool's definition Update an existing variable in a GTM workspace IN PLACE. Read-modify-write.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_gtm_variable safely

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

update_gtm_variable Rate-limited

update_gtm_variable 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": {
    "update_gtm_variable": {
      "limits": [
        {
          "counter": "update_gtm_variable_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 Samarth Gtm Mcp, apply this rule, and every update_gtm_variable call is checked against it from then on.

FAQ

Questions about update_gtm_variable

What does the update_gtm_variable tool do? +

Update an existing variable in a GTM workspace IN PLACE. Read-modify-write: the current variable is fetched and only the fields you pass are overlaid, with. It is categorised as a Write tool in the Samarth Gtm 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 update_gtm_variable? +

Register the Samarth Gtm MCP server in PolicyLayer and add a rule for update_gtm_variable: 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 Samarth Gtm Mcp. Nothing to install.

What risk level is update_gtm_variable? +

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

Can I rate-limit update_gtm_variable? +

Yes. Add a rate_limit block to the update_gtm_variable 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 update_gtm_variable completely? +

Set action: deny in the PolicyLayer policy for update_gtm_variable. 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 update_gtm_variable? +

update_gtm_variable is provided by the Samarth Gtm MCP server (samarth-gtm-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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