Subtracts one vector from another. Use this to find the difference between\ntwo vectors. For example, calculating the direction and distance from one\npoint to another.
AI agents invoke math_sub_vector to trigger actions in TypeSpec MCP Server. 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.
This tool performs a mathematical computation (vector subtraction). It doesn't read/write persistent data, delete anything, or involve finances. It executes a calculation and returns a result. Severity is low as it only performs arithmetic with no side effects on external systems.
From the tool's definition Subtracts one vector from another... calculating the direction and distance from one point to another
Documented attack patterns abuse exactly the kind of access math_sub_vector gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and TypeSpec MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for math_sub_vector:
{
"version": "1",
"default": "deny",
"tools": {
"math_sub_vector": {
"limits": [
{
"counter": "math_sub_vector_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}math_sub_vector 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.
Subtracts one vector from another. Use this to find the difference between\ntwo vectors. For example, calculating the direction and distance from one\npoint to another. It is categorised as a Execute tool in the TypeSpec MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the TypeSpec MCP Server MCP server in PolicyLayer and add a rule for math_sub_vector: 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 TypeSpec MCP Server. Nothing to install.
math_sub_vector 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 math_sub_vector 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 math_sub_vector. 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.
math_sub_vector is provided by the TypeSpec MCP Server MCP server (microsoft/typespec-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from TypeSpec MCP Server, 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.
28 TypeSpec MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.