generateBase64 · My Credentials MCP Server MCP

WHAT IT DOES

What generateBase64 does on My Credentials MCP Server

AI agents use generateBase64 to create or update resources in My Credentials MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your My Credentials MCP Server environment.

WHY IT NEEDS A POLICY

Why generateBase64 needs a policy

Generating Base64 strings is a reversible data creation operation. While it could theoretically be misused to create encoded payloads, the tool itself has no side effects beyond producing an encoded string. The context of API tokens suggests it may be used for legitimate credential generation, but the generation of tokens themselves constitutes a Write action rather than Execute.

From the tool's definition The tool 'generateBase64' generates encoded strings for data encoding and API tokens. This is a data generation function that creates (Write) encoded output, with no execution of external code or destructive operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generateBase64 Rate-limited

generateBase64 stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generateBase64": {
      "limits": [
        {
          "counter": "generatebase64_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches My Credentials MCP Server, so you can run agents against it safely.

FAQ

Questions about generateBase64

What does the generateBase64 tool do? +

Generate Base64 encoded strings for data encoding and API tokens. It is categorised as a Write tool in the My Credentials MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generateBase64? +

Register the My Credentials MCP Server MCP server in PolicyLayer and add a rule for generateBase64: 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 My Credentials MCP Server. Nothing to install.

What risk level is generateBase64? +

generateBase64 is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit generateBase64? +

Yes. Add a rate_limit block to the generateBase64 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 generateBase64 completely? +

Set action: deny in the PolicyLayer policy for generateBase64. 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 generateBase64? +

generateBase64 is provided by the My Credentials MCP Server MCP server (preangelleo/my-credentials-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.