Lists all available tools and methods
AI agents call debug to retrieve information from Mcp Hello World without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The debug tool performs introspection by listing available tools and methods. This is a read-only operation that retrieves metadata about the server's capabilities without modifying, executing, or deleting any data. It poses minimal security risk as it only exposes information about what the server can do.
From the tool's definition Tool description states it 'Lists all available tools and methods' - a retrieval/query operation with no side effects.
Attacks that exploit this kind of access
Lists all available tools and methods. It is categorised as a Read tool in the Mcp Hello World MCP Server, which means it retrieves data without modifying state.
Register the Mcp Hello World MCP server in PolicyLayer and add a rule for debug: 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 Hello World. Nothing to install.
debug is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the debug 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.
Set action: deny in the PolicyLayer policy for debug. 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.
debug is provided by the Mcp Hello World MCP server (mcp-hello-world). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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