pm-ls

Runs

SERVERBuild SOURCEDave-London/Pare

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-dave-london-build/pm-ls.md

WHAT IT DOES

What pm-ls does on Build

AI agents invoke pm-ls to trigger actions in Build. 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.

RISK

Why pm-ls is rated High

The description is truncated to just 'Runs', providing minimal information. Based on the tool name 'pm-ls' (likely 'package manager list'), this appears to execute a package manager listing command (e.g., npm ls, yarn list). List/ls commands in package managers typically read and display dependency trees but do involve executing an external process.

From the tool's definition Tool name 'pm-ls' and description 'Runs' (truncated/uninformative) suggest executing a package manager list command

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pm-ls safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Build, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pm-ls, this is the rule to start with:

pm-ls Rate-limited

pm-ls 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": {
    "pm-ls": {
      "limits": [
        {
          "counter": "pm-ls_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Build, apply this rule, and every pm-ls call is checked against it from then on.

FAQ

Questions about pm-ls

What does the pm-ls tool do? +

Runs. It is categorised as a Execute tool in the Build MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on pm-ls? +

Register the Build MCP server in PolicyLayer and add a rule for pm-ls: 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 Build. Nothing to install.

What risk level is pm-ls? +

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

Can I rate-limit pm-ls? +

Yes. Add a rate_limit block to the pm-ls 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 pm-ls completely? +

Set action: deny in the PolicyLayer policy for pm-ls. 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 pm-ls? +

pm-ls is provided by the Build MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Build, and thousands of servers like it.

This server

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