update · Tsurugi Python Mcp Tools MCP: Risk & Policy

WHAT IT DOES

What update does on Tsurugi Python Mcp Tools

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

WHY IT NEEDS A POLICY

Why update needs a policy

INSERT, UPDATE, and DELETE are write operations that create, modify, or remove data. They are reversible (can be rolled back in RDBMS transactions), distinguishing them from destructive operations. While the tool can delete rows, the reversibility through transaction rollback and the inclusion of INSERT/UPDATE (clearly write operations) makes Write the appropriate category.

From the tool's definition Tool description explicitly states 'Execute INSERT/UPDATE/DELETE' which are write operations that modify data reversibly. The tool name 'update' and the mention of INSERT/DELETE operations confirm data modification capabilities.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update Rate-limited

update 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": {
    "update": {
      "limits": [
        {
          "counter": "update_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 Tsurugi Python Mcp Tools, so you can run agents against it safely.

FAQ

Questions about update

What does the update tool do? +

Execute INSERT/UPDATE/DELETE in Tsurugi RDBMS. It is categorised as a Write tool in the Tsurugi Python Mcp Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update? +

Register the Tsurugi Python Mcp Tools MCP server in PolicyLayer and add a rule for update: 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 Tsurugi Python Mcp Tools. Nothing to install.

What risk level is update? +

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

Can I rate-limit update? +

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

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

update is provided by the Tsurugi Python Mcp Tools MCP server (septigram/tsurugi-python-mcp-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.