update_files · SACL MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_files does on SACL MCP Server

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

WHY IT NEEDS A POLICY

Why update_files needs a policy

This tool modifies file analysis data in a batch operation. While the description is somewhat vague about whether it modifies actual file contents or only analysis metadata, the core action is a write operation that creates or modifies data. The 'explicit agent-controlled' qualifier suggests the agent directly invokes this, raising the risk if misused.

From the tool's definition Tool name is 'update_files' with description stating it will 'Update multiple files analysis in batch'. The verb 'update' and the explicit mention of batch file modification indicates the tool creates or modifies data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_files Rate-limited

update_files 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_files": {
      "limits": [
        {
          "counter": "update_files_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 SACL MCP Server, so you can run agents against it safely.

FAQ

Questions about update_files

What does the update_files tool do? +

Update multiple files analysis in batch (explicit agent-controlled). It is categorised as a Write tool in the SACL 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_files? +

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

What risk level is update_files? +

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

Can I rate-limit update_files? +

Yes. Add a rate_limit block to the update_files 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_files completely? +

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

update_files is provided by the SACL MCP Server MCP server (ulasbilgen/sacl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.