set_library_description · Pinako AI Bridge MCP

WHAT IT DOES

What set_library_description does on Pinako AI Bridge

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

WHY IT NEEDS A POLICY

Why set_library_description needs a policy

This tool modifies metadata (a description field) on a library object, which is a reversible change. It does not delete data (Destructive), execute external code (Execute), move money (Financial), or merely retrieve data (Read).

From the tool's definition Tool name 'set_library_description' and description 'Updates a library' indicate modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_library_description Rate-limited

set_library_description 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": {
    "set_library_description": {
      "limits": [
        {
          "counter": "set_library_description_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 Pinako AI Bridge, so you can run agents against it safely.

FAQ

Questions about set_library_description

What does the set_library_description tool do? +

Updates a library\. It is categorised as a Write tool in the Pinako AI Bridge MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_library_description? +

Register the Pinako AI Bridge MCP server in PolicyLayer and add a rule for set_library_description: 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 Pinako AI Bridge. Nothing to install.

What risk level is set_library_description? +

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

Can I rate-limit set_library_description? +

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

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

set_library_description is provided by the Pinako AI Bridge MCP server (teleomorph/pinako-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.