Say hello to someone.
AI agents call hello_world to retrieve information from License Scanner MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a minimal, informational tool that produces a greeting message. It does not query, modify, delete, or execute any operations. It falls into the Read category as the lowest-risk classification for tools with minimal functionality, though it could arguably be 'Other'. Read is appropriate given the harmless nature of the output.
From the tool's definition Tool name 'hello_world' with description 'Say hello to someone' indicates a simple greeting function with no data retrieval, modification, execution of external operations, or side effects.
Attacks that exploit this kind of access
Say hello to someone. It is categorised as a Read tool in the License Scanner MCP Server MCP Server, which means it retrieves data without modifying state.
Register the License Scanner MCP Server MCP server in PolicyLayer and add a rule for hello_world: 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 License Scanner MCP Server. Nothing to install.
hello_world 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 hello_world 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 hello_world. 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.
hello_world is provided by the License Scanner MCP Server MCP server (ryancadby/mcp-license-scanner). 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.
Teams ship this data inside their own products. See what a licence covers →