patch_connection_tags · Nango MCP: Risk & Policy

WHAT IT DOES

What patch_connection_tags does on Nango

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

WHY IT NEEDS A POLICY

Why patch_connection_tags needs a policy

The tool updates a connection's tag set, which is a reversible data modification operation. It does not irreversibly delete data (not Destructive), does not execute arbitrary code (not Execute), and does not involve financial transactions (not Financial). The advisory to 'fetch and merge first' confirms this is a write operation where overwrites are possible.

From the tool's definition patch_connection_tags: Replace a connection's complete tag set. This modifies existing connection metadata reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

patch_connection_tags Rate-limited

patch_connection_tags 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": {
    "patch_connection_tags": {
      "limits": [
        {
          "counter": "patch_connection_tags_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Nango, so you can run agents against it safely.

FAQ

Questions about patch_connection_tags

What does the patch_connection_tags tool do? +

Replace a connection's complete tag set. Fetch and merge first when changing one tag. It is categorised as a Write tool in the Nango MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on patch_connection_tags? +

Register the Nango MCP server in PolicyLayer and add a rule for patch_connection_tags: 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 Nango. Nothing to install.

What risk level is patch_connection_tags? +

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

Can I rate-limit patch_connection_tags? +

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

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

patch_connection_tags is provided by the Nango MCP server (levsky22/nango-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.