Low Risk

list_validators

List active validators on the Klever blockchain network. Returns validator addresses, names, commission rates, delegation info, and staking amounts.

Part of the Mcp Klever Vm server.

list_validators is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call list_validators to retrieve information from Mcp Klever Vm without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though list_validators only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_validators": {}
  }
}

See the full Mcp Klever Vm policy for all 16 tools.

Get this rule live on your own Mcp Klever Vm server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access list_validators gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so list_validators only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the list_validators tool do? +

List active validators on the Klever blockchain network. Returns validator addresses, names, commission rates, delegation info, and staking amounts.. It is categorised as a Read tool in the Mcp Klever Vm MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_validators? +

Register the Mcp Klever Vm MCP server in PolicyLayer and add a rule for list_validators: 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 Klever Vm. Nothing to install.

What risk level is list_validators? +

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

Can I rate-limit list_validators? +

Yes. Add a rate_limit block to the list_validators 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_validators completely? +

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

list_validators is provided by the Mcp Klever Vm MCP server (@klever/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Klever Vm tool call.

Deterministic rules across all 16 Mcp Klever Vm tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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