update_issue · Mcp Github MCP: Risk & Policy

WHAT IT DOES

What update_issue does on Mcp Github

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

WHY IT NEEDS A POLICY

Why update_issue needs a policy

This tool creates or modifies data in a reversible manner. It updates issue metadata on GitHub, which is a write operation. While it affects repository state, changes can be undone (re-edited or reverted), so it does not rise to Destructive.

From the tool's definition 'Update an existing issue in a GitHub repository' — modifies existing issue data (title, description, labels, assignees, state) reversibly without deletion.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_issue Rate-limited

update_issue 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_issue": {
      "limits": [
        {
          "counter": "update_issue_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 Mcp Github, so you can run agents against it safely.

FAQ

Questions about update_issue

What does the update_issue tool do? +

Update an existing issue in a GitHub repository. It is categorised as a Write tool in the Mcp Github 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_issue? +

Register the Mcp Github MCP server in PolicyLayer and add a rule for update_issue: 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 Mcp Github. Nothing to install.

What risk level is update_issue? +

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

Can I rate-limit update_issue? +

Yes. Add a rate_limit block to the update_issue 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_issue completely? +

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

update_issue is provided by the Mcp Github MCP server (@missionsquad/mcp-github). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.