AI agents call get-github-user to retrieve information from Basic without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves publicly available GitHub user profile information. The verb 'Fetches' combined with 'public profile information' clearly indicates a read-only operation that queries data without creating, modifying, deleting, or executing anything. The data being accessed is public and the operation is idempotent with no side effects.
From the tool's definition Tool name 'get-github-user' and description 'Fetches public profile information for a GitHub user' indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Fetches public profile information for a GitHub user. It is categorised as a Read tool in the Basic MCP Server, which means it retrieves data without modifying state.
Register the Basic MCP server in PolicyLayer and add a rule for get-github-user: 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 Basic. Nothing to install.
get-github-user 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 get-github-user 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 get-github-user. 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.
get-github-user is provided by the Basic MCP server (tchoupoguy/basic-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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