AI agents invoke multiply to trigger actions in Mcp Arena. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Multiplying two numbers is a pure mathematical computation with no side effects, data access, or external interactions. It doesn't neatly fit Read (no data retrieval), Write (no data modification), or the more severe categories. The closest category is Execute since it performs an operation/calculation, though the blast radius is essentially zero.
From the tool's definition "Multiply two numbers" — performs a computation/operation on inputs
Documented attack patterns abuse exactly the kind of access multiply gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Arena, and nothing reaches the server without passing your rules. This is the rule we recommend for multiply:
{
"version": "1",
"default": "deny",
"tools": {
"multiply": {
"limits": [
{
"counter": "multiply_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}multiply stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Multiply two numbers. It is categorised as a Execute tool in the Mcp Arena MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Mcp Arena MCP server in PolicyLayer and add a rule for multiply: 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 Arena. Nothing to install.
multiply is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the multiply 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 multiply. 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.
multiply is provided by the Mcp Arena MCP server (satyamsingh8306/mcp_arena). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Arena, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
4 Mcp Arena tools catalogued and risk-classified — across an index of 43,000+ MCP servers.