reg_read

Read one value (name given) or list every value of a key (name empty): name, type and data.

SERVERMcp Hands SOURCEhuocai250/mcp-hands

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/mcp-hands/reg-read.md

WHAT IT DOES

What reg_read does on Mcp Hands

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

RISK

Why reg_read is rated Low

Even though reg_read only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs reg_read safely

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

reg_read Allowed

reg_read 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": {
    "reg_read": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Hands, apply this rule, and every reg_read call is checked against it from then on.

FAQ

Questions about reg_read

What does the reg_read tool do? +

Read one value (name given) or list every value of a key (name empty): name, type and data. It is categorised as a Read tool in the Mcp Hands MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on reg_read? +

Register the Mcp Hands MCP server in PolicyLayer and add a rule for reg_read: 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 Mcp Hands. Nothing to install.

What risk level is reg_read? +

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

Can I rate-limit reg_read? +

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

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

reg_read is provided by the Mcp Hands MCP server (huocai250/mcp-hands). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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