strato.rpc · Griphook MCP: Risk & Policy

WHAT IT DOES

What strato.rpc does on Griphook

AI agents invoke strato.rpc to trigger actions in Griphook. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why strato.rpc needs a policy

JSON-RPC proxying on a blockchain/DeFi platform allows arbitrary calls including contract execution, state-changing transactions, and potentially financial operations. Since the tool accepts arbitrary RPC requests, the most severe applicable category is Execute (and could encompass Financial or Destructive depending on what RPC methods are called).

From the tool's definition "Proxy a JSON-RPC request through the backend RPC router" — arbitrary JSON-RPC calls can execute smart contracts, send transactions, or trigger any blockchain operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

strato.rpc Rate-limited

strato.rpc stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "strato.rpc": {
      "limits": [
        {
          "counter": "strato.rpc_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about strato.rpc

What does the strato.rpc tool do? +

Proxy a JSON-RPC request through the backend RPC router. It is categorised as a Execute tool in the Griphook MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on strato.rpc? +

Register the Griphook MCP server in PolicyLayer and add a rule for strato.rpc: 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 Griphook. Nothing to install.

What risk level is strato.rpc? +

strato.rpc is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit strato.rpc? +

Yes. Add a rate_limit block to the strato.rpc 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 strato.rpc completely? +

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

strato.rpc is provided by the Griphook MCP server (strato-net/strato-griphook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.