Compute magnetic field at distance r from an infinite straight wire using B = μ₀I / (2πr)
AI agents call biot_savart_wire to retrieve information from Magnetics SME 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 physics calculation tool that takes input parameters (current I, distance r, permeability constant μ₀) and returns a computed magnetic field value. It performs no side effects, does not modify any state, does not execute arbitrary code, and does not access or change external systems. It is analogous to a mathematical function lookup or physics constant retrieval.
From the tool's definition Tool computes and returns magnetic field values using the Biot-Savart equation for a straight wire (B = μ₀I / (2πr)). The description indicates pure calculation with no modification, creation, deletion, or execution of external code.
Attacks that exploit this kind of access
Compute magnetic field at distance r from an infinite straight wire using B = μ₀I / (2πr). It is categorised as a Read tool in the Magnetics SME MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Magnetics SME MCP Server MCP server in PolicyLayer and add a rule for biot_savart_wire: 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 Magnetics SME MCP Server. Nothing to install.
biot_savart_wire 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 biot_savart_wire 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 biot_savart_wire. 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.
biot_savart_wire is provided by the Magnetics SME MCP Server MCP server (jkearney126/maxwell_bot). 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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