Get detailed explanations of code from GitHub Copilot
AI agents call copilot_explain to retrieve information from Copilot MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool reads and analyzes existing code to generate explanations. It does not create, modify, delete, or execute code. The operation is entirely read-only and produces informational output only. Even though it leverages GitHub authentication, the action itself retrieves data without side effects.
From the tool's definition Tool description states it provides 'detailed explanations of code' — a passive information retrieval operation with no mutations, deletions, or external side effects beyond querying Copilot for analysis.
Attacks that exploit this kind of access
Get detailed explanations of code from GitHub Copilot. It is categorised as a Read tool in the Copilot MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Copilot MCP Server MCP server in PolicyLayer and add a rule for copilot_explain: 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 Copilot MCP Server. Nothing to install.
copilot_explain 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 copilot_explain 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 copilot_explain. 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.
copilot_explain is provided by the Copilot MCP Server MCP server (willianpaiva/copilot-mcp). 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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