decode-base64 · Underground Cultural District MCP Server MCP

WHAT IT DOES

What decode-base64 does on Underground Cultural District MCP Server

AI agents call decode-base64 to retrieve information from Underground Cultural District MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why decode-base64 needs a policy

This tool performs a pure local transformation (decoding Base64-encoded text) with no external interactions, data storage, or destructive actions. It reads input and returns decoded output, making it a Read/utility operation with minimal blast radius.

From the tool's definition 'Base64 decode text' — decodes/transforms input data with no side effects

Attacks that exploit this kind of access

Questions about decode-base64

What does the decode-base64 tool do? +

Base64 decode text. It is categorised as a Read tool in the Underground Cultural District MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on decode-base64? +

Register the Underground Cultural District MCP Server MCP server in PolicyLayer and add a rule for decode-base64: 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 Underground Cultural District MCP Server. Nothing to install.

What risk level is decode-base64? +

decode-base64 is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit decode-base64? +

Yes. Add a rate_limit block to the decode-base64 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 decode-base64 completely? +

Set action: deny in the PolicyLayer policy for decode-base64. 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 decode-base64? +

decode-base64 is provided by the Underground Cultural District MCP Server MCP server (lisamaraventano-spine/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.