add_set · MCP Logger MCP: Risk & Policy

WHAT IT DOES

What add_set does on MCP Logger

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

WHY IT NEEDS A POLICY

Why add_set needs a policy

The 'add_set' tool creates new workout set records in the fitness tracker, modifying the database state reversibly. This is a Write operation—data can be updated or corrected later. It lacks the irreversibility of Destructive tools and the runtime code execution risks of Execute tools.

From the tool's definition Tool name 'add_set' in a fitness tracking context suggests adding a new workout set record. Sibling tools include 'add_exercise' and 'add_or_update_meal_item', establishing a pattern of Write operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_set Rate-limited

add_set 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": {
    "add_set": {
      "limits": [
        {
          "counter": "add_set_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 Logger, so you can run agents against it safely.

FAQ

Questions about add_set

What does the add_set tool do? +

add_set. It is categorised as a Write tool in the MCP Logger MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_set? +

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

What risk level is add_set? +

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

Can I rate-limit add_set? +

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

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

add_set is provided by the MCP Logger MCP server (johnzolton/mcp-logger). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.