Subtract two numbers
AI agents call subtract to retrieve information from MCP Demo Project without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Subtraction is a stateless arithmetic operation that takes two numbers as input and returns a result. It does not read from or write to any data store, execute external commands, or have any side effects. It is analogous to a read/query operation in terms of risk, as it only computes and returns a value.
From the tool's definition Tool name 'subtract' and description 'Subtract two numbers' indicate a pure mathematical computation with no side effects, data storage, or external interactions.
Attacks that exploit this kind of access
Subtract two numbers. It is categorised as a Read tool in the MCP Demo Project MCP Server, which means it retrieves data without modifying state.
Register the MCP Demo Project MCP server in PolicyLayer and add a rule for subtract: 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 Project. Nothing to install.
subtract 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 subtract 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 subtract. 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.
subtract is provided by the MCP Demo Project MCP server (vaibhavgala262/mcp_servers). 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 →