decision_memory_add · Universal Dev MCP: Risk & Policy

WHAT IT DOES

What decision_memory_add does on Universal Dev MCP

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

WHY IT NEEDS A POLICY

Why decision_memory_add needs a policy

This tool creates or modifies data (a decision memory entry) in a reversible manner. The 'add' operation is characteristic of Write category tools. Severity is medium because modifying user-specific memory could affect application behavior and decision-making, but the effect is typically reversible (entries can be removed or updated).

From the tool's definition Tool name contains 'add' and description explicitly states 'add' operation. The 'user_id based' qualifier indicates it modifies user-specific data structures.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

decision_memory_add Rate-limited

decision_memory_add 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": {
    "decision_memory_add": {
      "limits": [
        {
          "counter": "decision_memory_add_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Universal Dev MCP, so you can run agents against it safely.

FAQ

Questions about decision_memory_add

What does the decision_memory_add tool do? +

Decision memory add (user_id based). It is categorised as a Write tool in the Universal Dev 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 decision_memory_add? +

Register the Universal Dev MCP server in PolicyLayer and add a rule for decision_memory_add: 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 Universal Dev MCP. Nothing to install.

What risk level is decision_memory_add? +

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

Can I rate-limit decision_memory_add? +

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

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

decision_memory_add is provided by the Universal Dev MCP server (kallusuvaidyam/universal_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.