update_item_field · GitHub Projects MCP Server MCP

WHAT IT DOES

What update_item_field does on GitHub Projects MCP Server

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

WHY IT NEEDS A POLICY

Why update_item_field needs a policy

This tool creates or modifies data reversibly, which defines the Write category. It does not delete data (Destructive), execute arbitrary code (Execute), move money (Financial), or retrieve without side effects (Read). Severity is medium because misuse could corrupt project metadata or workflow states, affecting team coordination, but changes are reversible and scoped to a single project field on a single item.

From the tool's definition Tool description states 'Update a field value on an item in a GitHub Project V2' — the verb 'update' indicates modification of existing data. The tool modifies project item field values reversibly (a field value can be changed again or reverted).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_item_field Rate-limited

update_item_field 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_item_field": {
      "limits": [
        {
          "counter": "update_item_field_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 GitHub Projects MCP Server, so you can run agents against it safely.

FAQ

Questions about update_item_field

What does the update_item_field tool do? +

Update a field value on an item in a GitHub Project V2. It is categorised as a Write tool in the GitHub Projects MCP Server 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_item_field? +

Register the GitHub Projects MCP Server MCP server in PolicyLayer and add a rule for update_item_field: 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 GitHub Projects MCP Server. Nothing to install.

What risk level is update_item_field? +

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

Can I rate-limit update_item_field? +

Yes. Add a rate_limit block to the update_item_field 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_item_field completely? +

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

update_item_field is provided by the GitHub Projects MCP Server MCP server (lexmata/github-projects-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.