register_toolchain_path · MCP for Vivado MCP: Risk & Policy

WHAT IT DOES

What register_toolchain_path does on MCP for Vivado

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

WHY IT NEEDS A POLICY

Why register_toolchain_path needs a policy

This tool modifies system configuration by registering and persisting toolchain paths. While not destructive (changes are reversible), it qualifies as Write because it creates/modifies persisted configuration data.

From the tool's definition The tool 'register_toolchain_path' stores configuration that 'persist[s] it for future sessions', which is a durable modification to the MCP server's state and configuration registry.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

register_toolchain_path Rate-limited

register_toolchain_path 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": {
    "register_toolchain_path": {
      "limits": [
        {
          "counter": "register_toolchain_path_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 for Vivado, so you can run agents against it safely.

FAQ

Questions about register_toolchain_path

What does the register_toolchain_path tool do? +

Register another Vivado install path or vivado.bat path and persist it for future sessions. It is categorised as a Write tool in the MCP for Vivado MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on register_toolchain_path? +

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

What risk level is register_toolchain_path? +

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

Can I rate-limit register_toolchain_path? +

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

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

register_toolchain_path is provided by the MCP for Vivado MCP server (lzw12123/mcp-for-vivado). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.