list_chunks

THE RISK

Low Risk

Why list_chunks needs a policy

This tool retrieves and displays metadata about chunks (organizational units in a Metashape project) without modifying, executing operations on, or destroying any data. It is purely informational and aligns with the 'Read' category pattern of listing/fetching data.

From the tool's definition Tool name 'list_chunks' and description 'List all chunks in the project with summary info' indicate a query/retrieval operation with no side effects.

Documented attack patterns abuse exactly the kind of access list_chunks gives an agent:

POLICY

How to control list_chunks

PolicyLayer is an MCP gateway — it sits between your AI agents and Metashape MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_chunks:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_chunks": {}
  }
}

list_chunks is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Metashape MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Metashape MCP Server tools

Destructive clean_model Remove model artifacts based on filtering criteria. Destructive clear_dem Remove the DEM from the active chunk to free memory. Destructive clear_depth_maps Remove depth maps from the active chunk to free memory. Destructive clear_masks Remove masks from cameras. Destructive clear_model Remove the 3D model from the active chunk to free memory. Destructive clear_orthomosaic Remove the orthomosaic from the active chunk to free memory. Destructive clear_point_cloud Remove the dense point cloud from the active chunk to free memory. Destructive clear_tiled_model Remove the tiled model from the active chunk to free memory.

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Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_chunks

What does the list_chunks tool do? +

List all chunks in the project with summary info. It is categorised as a Read tool in the Metashape MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_chunks? +

Register the Metashape MCP Server MCP server in PolicyLayer and add a rule for list_chunks: 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 Metashape MCP Server. Nothing to install.

What risk level is list_chunks? +

list_chunks is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_chunks? +

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

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

list_chunks is provided by the Metashape MCP Server MCP server (jenkinsm13/metashape-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Metashape MCP Server tool call.

Start from Metashape MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →