decode-jwt · Underground Cultural District MCP Server MCP

WHAT IT DOES

What decode-jwt does on Underground Cultural District MCP Server

AI agents call decode-jwt 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-jwt needs a policy

Decoding a JWT token is a read-only operation that parses and displays the token's header, payload, and signature. It performs no side effects, does not modify any data, and does not validate or execute anything. The operation is purely informational.

From the tool's definition Decode JWT tokens

Attacks that exploit this kind of access

Questions about decode-jwt

What does the decode-jwt tool do? +

Decode JWT tokens. 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-jwt? +

Register the Underground Cultural District MCP Server MCP server in PolicyLayer and add a rule for decode-jwt: 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-jwt? +

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

Can I rate-limit decode-jwt? +

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

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

decode-jwt 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.