add_assumption · Mipiti MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_assumption does on Mipiti MCP Server

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

WHY IT NEEDS A POLICY

Why add_assumption needs a policy

This tool creates or inserts assumption records into a threat modeling platform. While the description is empty (lowering confidence slightly), the name and server context strongly indicate data creation without deletion or irreversibility. The impact is reversible (assumptions can be updated or removed), making it Write rather than Destructive.

From the tool's definition Tool name 'add_assumption' with prefix 'add_' indicates creation of new data. Server context shows tools for managing threat models, controls, assumptions, and compliance data programmatically.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_assumption Rate-limited

add_assumption 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_assumption": {
      "limits": [
        {
          "counter": "add_assumption_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 Mipiti MCP Server, so you can run agents against it safely.

FAQ

Questions about add_assumption

What does the add_assumption tool do? +

add_assumption. It is categorised as a Write tool in the Mipiti 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 add_assumption? +

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

What risk level is add_assumption? +

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

Can I rate-limit add_assumption? +

Yes. Add a rate_limit block to the add_assumption 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_assumption completely? +

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

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