cluster_by_topic

Cluster feed entries by semantic similarity

SERVERContextForge MCP Gateway SOURCEjrmatherly/mcp-context-forge

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/jrmatherly-mcp-context-forge/cluster-by-topic.md

WHAT IT DOES

What cluster_by_topic does on ContextForge MCP Gateway

AI agents call cluster_by_topic to retrieve information from ContextForge MCP Gateway without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why cluster_by_topic is rated Low

This is a pure read operation that performs semantic analysis on feed data to produce a grouped/organized view. It has no side effects on the underlying data, does not execute arbitrary code or external operations, and does not modify or destroy anything. The clustering is derived entirely from the input parameters and input data, making it a low-risk Read operation suitable for AI agent access.

From the tool's definition Tool name 'cluster_by_topic' and description 'Cluster feed entries by semantic similarity' indicate a data analysis/query operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cluster_by_topic safely

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

cluster_by_topic Allowed

cluster_by_topic is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ContextForge MCP Gateway, apply this rule, and every cluster_by_topic call is checked against it from then on.

FAQ

Questions about cluster_by_topic

What does the cluster_by_topic tool do? +

Cluster feed entries by semantic similarity. It is categorised as a Read tool in the ContextForge MCP Gateway MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on cluster_by_topic? +

Register the ContextForge MCP Gateway MCP server in PolicyLayer and add a rule for cluster_by_topic: 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 ContextForge MCP Gateway. Nothing to install.

What risk level is cluster_by_topic? +

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

Can I rate-limit cluster_by_topic? +

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

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

cluster_by_topic is provided by the ContextForge MCP Gateway MCP server (jrmatherly/mcp-context-forge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on ContextForge MCP Gateway, and thousands of servers like it.

This server

All 221 ContextForge MCP Gateway tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →