save_contact · Cryptosense MCP: Risk & Policy

WHAT IT DOES

What save_contact does on Cryptosense

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

WHY IT NEEDS A POLICY

Why save_contact needs a policy

The name 'save_contact' suggests storing or updating contact information, which is a reversible write operation typical of a Write category tool. However, confidence is moderate due to the empty description and the generic nature of the tool name without context about scope or side effects.

From the tool's definition Tool name 'save_contact' indicates a create/modify operation. Description is empty, providing no specific details about what data is saved or how it is used.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_contact Rate-limited

save_contact 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": {
    "save_contact": {
      "limits": [
        {
          "counter": "save_contact_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 Cryptosense, so you can run agents against it safely.

FAQ

Questions about save_contact

What does the save_contact tool do? +

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

How do I enforce a policy on save_contact? +

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

What risk level is save_contact? +

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

Can I rate-limit save_contact? +

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

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

save_contact is provided by the Cryptosense MCP server (josephibra/cryptosense-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.