Explain what a piece of MAGMA code does
AI agents call explain_magma_code to retrieve information from MCP MAGMA Handbook Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and presents explanations of MAGMA code—a read-only operation with no side effects. It does not execute code, modify data, delete resources, or move money. The worst plausible misuse is returning incorrect or misleading explanations, which has low blast radius. Classification: Read/low severity.
From the tool's definition Tool name 'explain_magma_code' and description 'Explain what a piece of MAGMA code does' indicate a retrieval/analysis function that queries documentation or performs semantic analysis without modifying or executing code.
Attacks that exploit this kind of access
Explain what a piece of MAGMA code does. It is categorised as a Read tool in the MCP MAGMA Handbook Server MCP Server, which means it retrieves data without modifying state.
Register the MCP MAGMA Handbook Server MCP server in PolicyLayer and add a rule for explain_magma_code: 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 MAGMA Handbook Server. Nothing to install.
explain_magma_code 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 explain_magma_code 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 explain_magma_code. 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.
explain_magma_code is provided by the MCP MAGMA Handbook Server MCP server (legenai/mcp-magma-handbook). 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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