fetch_rule

A read tool on the ComplianceCow MCP server.

SERVERComplianceCow MCP Server SOURCEcompliancecow/cow-mcp

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/compliancecow-cow-mcp/fetch-rule.md

WHAT IT DOES

What fetch_rule does on ComplianceCow MCP Server

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

RISK

Why fetch_rule is rated Low

The 'fetch' verb semantically implies retrieving or querying data without modification. Given the ComplianceCow server's primary function of retrieving 'compliance insights, dashboard data, and auditable evidence', this tool most likely retrieves rule data from the Compliance Graph. The empty description reduces confidence slightly, but the naming pattern aligns with other non-destructive operations on the server (e.

From the tool's definition Tool name 'fetch_rule' indicates data retrieval (fetch is a Read operation); empty description limits confidence but the action verb fetch strongly suggests querying without side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs fetch_rule safely

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

fetch_rule Allowed

fetch_rule 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": {
    "fetch_rule": {}
  }
}

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

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

FAQ

Questions about fetch_rule

What does the fetch_rule tool do? +

fetch_rule is a read tool on the ComplianceCow MCP Server MCP server. It is categorised as a Read tool in the ComplianceCow MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on fetch_rule? +

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

What risk level is fetch_rule? +

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

Can I rate-limit fetch_rule? +

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

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

fetch_rule is provided by the ComplianceCow MCP Server MCP server (compliancecow/cow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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