Add two numbers together
AI agents call add to retrieve information from MCP Demo Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple arithmetic addition of two numbers. It is a pure function with no side effects, no data storage, no external API calls, and no ability to modify or delete anything. It falls into the Read category as it merely computes and returns a value.
From the tool's definition 'Add two numbers together' — pure mathematical computation with no side effects, no data modification, no external operations
Attacks that exploit this kind of access
Add two numbers together. It is categorised as a Read tool in the MCP Demo Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Demo Server MCP server in PolicyLayer and add a rule for add: 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 Demo Server. Nothing to install.
add 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 add 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 add. 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.
add is provided by the MCP Demo Server MCP server (joeguo911/mcp-demo). 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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