coda_update_doc · Coda MCP Server MCP: Risk & Policy

WHAT IT DOES

What coda_update_doc does on Coda MCP Server

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

WHY IT NEEDS A POLICY

Why coda_update_doc needs a policy

This tool modifies document content reversibly. While it affects data, it does not delete or permanently destroy information, and does not execute arbitrary code or move money. The severity is medium because unauthorized document updates could affect collaborative work and data integrity, but the blast radius is limited to document content within a single workspace.

From the tool's definition Tool name 'coda_update_doc' and description 'Update a document' indicate modification of existing data in Coda.io documents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

coda_update_doc Rate-limited

coda_update_doc 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": {
    "coda_update_doc": {
      "limits": [
        {
          "counter": "coda_update_doc_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 Coda MCP Server, so you can run agents against it safely.

FAQ

Questions about coda_update_doc

What does the coda_update_doc tool do? +

Update a document. It is categorised as a Write tool in the Coda 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 coda_update_doc? +

Register the Coda MCP Server MCP server in PolicyLayer and add a rule for coda_update_doc: 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 Coda MCP Server. Nothing to install.

What risk level is coda_update_doc? +

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

Can I rate-limit coda_update_doc? +

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

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

coda_update_doc is provided by the Coda MCP Server MCP server (thierryvm/coda-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.