add_library_to_group · Pinako AI Bridge MCP: Risk & Policy

WHAT IT DOES

What add_library_to_group does on Pinako AI Bridge

AI agents use add_library_to_group 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 add_library_to_group needs a policy

This tool creates or modifies organizational relationships between data entities (libraries and groups). It is reversible (a library can be removed from a group later) and does not delete, execute arbitrary code, or affect financial systems. Write category applies to tools that create or modify data reversibly.

From the tool's definition Tool modifies the grouping structure of existing libraries by adding a library to a group. Description states 'Adds an existing library to an existing group' - a reversible structural modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_library_to_group Rate-limited

add_library_to_group 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": {
    "add_library_to_group": {
      "limits": [
        {
          "counter": "add_library_to_group_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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 add_library_to_group

What does the add_library_to_group tool do? +

Adds an existing library to an existing group. A library can belong to at most one group; rejects with LIBRARY_ALREADY_IN_GROUP / LIBRARY_IN_OTHER_GROUP if it\. 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 add_library_to_group? +

Register the Pinako AI Bridge MCP server in PolicyLayer and add a rule for add_library_to_group: 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 add_library_to_group? +

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

Can I rate-limit add_library_to_group? +

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

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

add_library_to_group 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.