View past Xfinity bills and payment history for a specified number of months.
AI agents call get_bill_history to retrieve information from Xfinity MCP 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 queries existing billing data without creating, modifying, deleting, or executing any operations. It has no side effects and presents minimal risk. Even if an AI agent misuses it by requesting all available history, the worst outcome is information disclosure of the user's own account data, which is low severity.
From the tool's definition Tool name 'get_bill_history' and description 'View past Xfinity bills and payment history' indicate data retrieval only. The verb 'View' and absence of modification language confirm read-only access to historical billing records.
Attacks that exploit this kind of access
View past Xfinity bills and payment history for a specified number of months. It is categorised as a Read tool in the Xfinity MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Xfinity MCP Server MCP server in PolicyLayer and add a rule for get_bill_history: 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 Xfinity MCP Server. Nothing to install.
get_bill_history 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_bill_history 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_bill_history. 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_bill_history is provided by the Xfinity MCP Server MCP server (markswendsen-code/mcp-xfinity). 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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