update_fix_status · Navable MCP: Risk & Policy

WHAT IT DOES

What update_fix_status does on Navable MCP

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

WHY IT NEEDS A POLICY

Why update_fix_status needs a policy

This tool modifies existing data (accessibility fix plan status) in a reversible manner. It does not execute arbitrary code or delete data, but rather updates status fields in a structured JSON file. The severity is medium because misuse could corrupt or mislead an accessibility remediation workflow, but the effects are reversible—statuses can be corrected in subsequent calls.

From the tool's definition Tool description explicitly states 'Update the status of one or more items in .navable-plan.json', indicating modification of data in a JSON configuration file. The term 'Update' is a classic Write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_fix_status Rate-limited

update_fix_status 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_fix_status": {
      "limits": [
        {
          "counter": "update_fix_status_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 Navable MCP, so you can run agents against it safely.

FAQ

Questions about update_fix_status

What does the update_fix_status tool do? +

Update the status of one or more items in .navable-plan.json.\n\n. It is categorised as a Write tool in the Navable 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_fix_status? +

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

What risk level is update_fix_status? +

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

Can I rate-limit update_fix_status? +

Yes. Add a rate_limit block to the update_fix_status 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_fix_status completely? +

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

update_fix_status is provided by the Navable MCP server (web-dna/navable-web-accessibility-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.